New article in ‘Nature’: Towards a rigorous understanding of societal responses to climate change

A large scholarship currently holds that before the onset of anthropogenic global warming, natural climatic changes long provoked subsistence crises and, occasionally, civilizational collapses among human societies. This scholarship, which we term the ‘history of climate and society’ (HCS), is pursued by researchers from a wide range of disciplines, including archaeologists, economists, geneticists, geographers, historians, linguists and palaeoclimatologists. We argue that, despite the wide interest in HCS, the field suffers from numerous biases, and often does not account for the local effects and spatiotemporal heterogeneity of past climate changes or the challenges of interpreting historical sources. Here we propose an interdisciplinary framework for uncovering climate–society interactions that emphasizes the mechanics by which climate change has influenced human history, and the uncertainties inherent in discerning that influence across different spatiotemporal scales. Although we acknowledge that climate change has sometimes had destructive effects on past societies, the application of our framework to numerous case studies uncovers five pathways by which populations survived—and often thrived—in the face of climatic pressures.

Read the full article here

Degroot, D., Anchukaitis, K., Bauch, M. et al. Towards a rigorous understanding of societal responses to climate change. Nature 591, 539–550 (2021).

New online exhibition: “Weathered History”

The online exhibition “Weathered History” of the Leibniz Institute for the History and Culture of Eastern Europe (GWZO) visualises climate history for the first time using objects from 12,000 years of human history. On display are diverse testimonies from a wide range of countries, from cave paintings to sometimes curious technical inventions such as the ‘dandy horse’ and weather reports on cigarette packets from Hong Kong. The exhibition, which is available in German and English, was realised in cooperation with the CRIAS working group of the international research network Past Global Changes (PAGES).

Humans have always been confronted with changing environmental conditions and climate changes. Extreme weather events such as droughts, floods and storms or natural disasters such as volcanic eruptions often brought destruction and death. They imprinted themselves on the memory of the survivors and left more or less visible traces in art, science and everyday life. The exhibition “Weathered History” follows some of these traces. Some objects may be surprising witnesses to the memory of weather catastrophes; but they also show how skilfully historical societies adapted to climate changes. The selection of objects is global, but there are remarkable pieces from the German-speaking countries in particular: The oldest drinkable wine in the world, which owes its creation to a millennial summer; a miniature horn made of clay for protection against thunderstorms from Martin Luther’s childhood home or the bell that inspired Friedrich Schiller to write his famous poem of the same name.

The online exhibition was curated by GWZO staff members Diana Lucia Feitsch and Dr Martin Bauch, who leads the VW Foundation-funded Freigeist Junior Research Group “The Dantean Anomaly (1309-1321)” at the Institute. The team examines rapid climate change at the beginning of the 14th century and its effects on late medieval Europe. “What is unique about the exhibition is that no one ever tried to present a history of climate change with objects. Every researcher knows the one or the other object, but they have never been brought together. We tried to do that in a selection. I think we have successfully assembled the collective knowledge of a large professional community from the humanities and natural sciences“, says Martin Bauch. The greatest difficulty in realizing the exhibition was the current tense global pandemic situation. “It has been a challenge to clarify publication rights from around the world and get images with a decent resolution in these pandemic times,” Diana Lucia Feitsch says, “with archives and libraries closed or hardly available for requests.”

Have a look at the English version:

On the GWZO’s YouTube channel, the two curators provide a more detailed insight into the exhibition “Weathered History”, which can now be visited online. For example, they explain their motives for creating this exhibition and present their personal favourite piece. The interview is the first episode of the new in-house GWZO video series “Ostblick”, which allows insights into the work at the GWZO even under pandemic conditions.


NEW PUBLICATION: Just the Flu in 1323

This contribution investigates the possibilities of identifying Covid-19-like, highly infectious epidemics with low mortality rates in the premodern era. In its discussion of the chances and limits of such an endeavour, the essay focuses on a case study from 1323, when an epidemic that caused high fevers but relatively few deaths affected large parts of Europe, including Italy. The indications available in the historical records are examined in light of criteria that have been developed from modern influenza pandemics research. Finally, the essay examines the possible zoonotic origins of the 1323 epidemic and proposes broader lessons that could be drawn from researching premodern pandemics.

Bauch, Martin, Just the Flu in 1323? A Case study of a Highly Contagious Epidemic with Low Mortality and its Possible Origins in Late Medieval Europe, in: Journal for the History of Environment and Society 5 (2020), pp. 53–63 [= Special Issue: COVID-19 & Environmental History, ed. Tim Soens, Raf De Bront & Maïka De Keyzer]

NEW PUBLICATION – A prequel to the Dantean Anomaly: the precipitation seesaw and droughts of 1302 to 1307 in Europe

The cold/wet anomaly of the 1310s (“Dantean Anomaly”) has attracted a lot of attention from scholars, as it is commonly interpreted as a signal of the transition between the Medieval Climate Anomaly (MCA) and the Little Ice Age (LIA). The huge variability that can be observed during this decade, like the high interannual variability observed in the 1340s, has been highlighted as a side effect of this rapid climatic transition. In this paper, we demonstrate that a multi-seasonal drought of almost 2 years occurred in the Mediterranean between 1302 and 1304, followed by a series of hot, dry summers north of the Alps from 1304 to 1306. We suggest that this outstanding dry anomaly, unique in the 13th and 14th centuries, together with cold anomalies of the 1310s and the 1340s, is part of the climatic shift from the MCA to the LIA. Our reconstruction of the predominant weather patterns of the first decade of the 14th century – based on both documentary and proxy data – identifies multiple European precipitation seesaw events between 1302 and 1307, with similarities to the seesaw conditions which prevailed over continental Europe in 2018. It can be debated to what extent the 1302–1307 period can be compared to what is currently discussed regarding the influence of the phenomenon of Arctic amplification on the increasing frequency of persistent stable weather patterns that have occurred since the late 1980s. Additionally, this paper deals with socioeconomic and cultural responses to drought risks in the Middle Ages as outlined in contemporary sources and provides evidence that there is a significant correlation between pronounced dry seasons and fires that devastated cities.

Bauch, M., Labbé, T., Engel, A., and Seifert, P.: A prequel to the Dantean Anomaly: the precipitation seesaw and droughts of 1302 to 1307 in Europe, Clim. Past, 16, 2343–2358, , 2020

Video lecture M. Bauch: Geoengineering and the Middle Ages

The Berlin-based “Zentrum für Historische Forschungen” of the Polish Academy of Sciences organized, under the lead of Dr. Piotr Filipowski and Dr. Adam Izdebski (Paleo-Science and History, MPI for the Science of Human History, Jena) a series of online lectures with the thoughtprovoking title “What sort of past does the future need?”. Martin Bauch gave a presentation on the topic “Geoengineering and the Middle Ages: Lessons from medieval volcanic eruptions for the Anthropocene”:

New PAGES magazine: Climate Reconstruction and Impacts from the Archives of Societies

PAGES Working Group CRIAS (“Climate Reconstruction and Impacts from the Archives of Societies”) has edited the recent issue of Past Global Changes Magazine, with articles on all aspects of Historical Climatology and Climate History, including two contributions by Adrian Jusupovic (Polish Academy of Sciences) and Martin Bauch (GWZO, Freigeist Fellowship) on the potential of climate historical studies for the the High Medieval Rus‘ and by Undine Ott (GWZO, Freigeist Fellowship) on Climate History and the Mamluk Empire.

Have a look at the whole issue here.

CfP for IMC Leeds 2021: Before the Anthropocene – Medieval concepts of interdependent human-nature-relations

Leeds (UK), International Medieval Congress 2021: Climates

Date 5-8 July 2021

Deadline: 20 September 2020

In recent decades, climate history and historical climatology have focused on the economic and social impacts of long-term climatic changes like those which occurred during the Medieval Climate Anomaly or the Little Ice Age. Contemporary worries about global climate patterns have posed new, urgent questions to historians of climate: How did past societies perceive periods of rapid climate change? To what extent were they affected—not only economically, but also in their thinking about the relationship between humans and nature? Traditionally, climate history has focused on reconstruction and impact studies, which implies all too often a one-way relationship: Nature influencing human societies, with humanity merely reacting.

With the emergence of the concept of the Anthropocene, humanity has been recognized as a geological force responsible for fundamental and lasting changes of nature, not least concerning weather conditions via anthropogenic climate change. This raises questions about the degree of reciprocity and interdependence in the relationship between humans and nature. The human ability to reflect about its own agency regarding the course of nature, or the idea that humanity and nature share a common history, have been acknowledged as a postmodern disruption of established explanations of socio-natural relationships (D. Chakrabarty).

However, the distinction between the course of nature and the course of history has been established only since the eighteenth century and recent research made it clear that past societies were already able to think reflexively on their impact on the global environment. Indeed, premodern societies in general and medieval contemporaries in particular, had a very different view: they often assumed that human behavior influenced natural conditions, particularly weather. These assumptions were mediated in religious concepts that crossed into the spheres of politics and economy. Both European and non-European societies accepted the notion that “bad” human actions would backlash in inclement weather while “good” behavior would lead to benevolent conditions. Not only in a Christian context has this relationship often been interpreted by historians rather simplistically as a “retributive theology”. Nevertheless, this cosmological background held much greater social implications, as medieval populations assumed they had a causal influence on weather conditions, and vice versa. A recent example of such an approach has been a new study by Jean-Pierre Devroey on the “righteousness” (droiture) of the Carolingian emperors as a major feature of rulership at that time. Devroey convincingly demonstrates that eighth- and ninth-century thinkers shared a common theory of the “cosmic” dimension of the king that clearly connected good government with the fortune of weather and, consequently, harvests. In the end, he proposes that Carolingian legal-administrative reforms were chronologically connected to bad harvests caused by climate stress and hence constituted a direct political implication of this theoretical background.

The medieval interdependency of humans and nature plays out on at least two different levels: On the one hand, scholars’ written discourses—e.g. treatises, chronicles, letters, and homilies, etc.—give insight into the underlying theories, at least from the point of view of the elites, of the relationship between humanity and nature from Late Antiquity to the end of the Middle Ages in Europe and other parts of the world. On the other hand, sources on economic, infrastructural, and social/institutional history provide information, albeit indirectly, on periods of short-term climate change, as these periods eventually called for specific social adaptation processes. This documentation not only sheds light on the practical reactions of past societies facing abrupt phases of climate change but also enables us to identify underlying theoretical assumptions. Subsequently, this would allow to reconstruct societal adaptions and to examine, at the same time, how specific perceptions of nature shaped these reactions.

To address these issues, we welcome papers dealing with all areas of the globe and from scholars from diverse disciplinary backgrounds. The following questions might serve as possible starting points for paper proposals:

  • To what extent was the interaction between humans and nature—for example, in phases of rapid climate change in the medieval period—truly seen as reciprocal?
  • If the courses of history and nature are not separated in medieval mentalities, to what degree do contemporary witnesses credit natural events with influencing the course of human history?
  • To what extent were natural extreme events used to argue for specific social, economic, religious, and political goals?
  • Was this influence of humans on nature always limited to the context of simple retributive theology, or are other established cultural patterns decisive?
  • Were pragmatic, seemingly modern, i.e. “technocratic” reactions (like institutional reform and infrastructural responses) to natural extreme events in accordance or at odds with religious and cultural discourses?

Thanks to a generous support by our Leipzig-based home institution, the Leibniz Institute for the History and Culture of Eastern Europe (GWZO), we will be able to provide limited funds to reimburse the conference fees and other costs for early career researchers from Eastern and Eastern Central Europe.

A publication of the conference papers is planned. We encourage interested colleagues to submit 300 words abstracts for 20-minute papers by 20 September 2020. Please submit them by e-mail to:

Download this CfP

NEW! T. Labbé: Aux origines des politiques compassionnelles: Émergence de la sensibilité envers les victimes de catastrophes à la fin du Moyen Âge

Read the latest publication of Thomas Labbé on the politics of compassion in the prestigious “Annales”, or enjoy at least the English abstract below before you take a deep dive in your remaining French:

Adopting a socio-anthropological perspective that considers accounts of and reactions to extreme events as social constructs largely determined by sentiments shared and valorized within a given society, this article focuses on the emotions produced by natural disasters between the thirteenth and the sixteenth century. When it comes to the study of catastrophes, historiography has generally privileged the analysis of rational discourse, identifying the secularization of interpretative patterns following the Lisbon earthquake of 1755 as a decisive historical rupture. The emotion-based approach, however, reveals another discontinuity in Western attitudes, which has attracted less attention. Fifteenth- and especially sixteenth-century sources emphasize a new kind of sensitivity toward the “humanitarian” aspect of disasters. Though the interpretive framework remains that of sin and retribution, this shift nevertheless demonstrates an important change in the perception of social distress. First, the language used to describe catastrophes follows a new emotional pattern: over the sixteenth century, notions of terror and pity replace the fear and wonder that characterized medieval narratives. Désastres, a term that also emerged at this time, progressively come to be perceived as tragedies. Second, this new emotional construction is reflected in political theory and practice, as local authorities integrate urgent care for disaster victims into their sphere of responsibility. On a more general level, the article demonstrates the construction of a moral economy that progressively valorized the figure of the victim in perceptions of reality over the fifteenth and sixteenth centuries, planting the seeds of modern compassionate policies.

Labbé, T. (2019). Aux origines des politiques compassionnelles: Émergence de la sensibilité envers les victimes de catastrophes à la fin du Moyen Âge. Annales. Histoire, Sciences Sociales, 74(1), 45-71. doi:10.1017/ahss.2019.139

What to learn from past climate change and epidemics

An interview (in German) with Martin Bauch is dedicated to the topic of what we can learn today from researching past climate change and past epidemic events. The long form is online at (thanks to Sandra Kirchner), a shortened version appeared in the Frankfurter Rundschau on 18 April 2020

That climate history and the history of past pandemics is closely related is also an assumption shared by two colleagues from the US and Israel that have started recently their interesting podcast “Infectious Historians“. Despite the slightly scary name it’s well worth your time.

Medieval weather and diseases in the times of COVID-19

Please have a look at a collateral result from climate historical research published on the Mittelalterblog: You start looking for bad weather 700 years ago, and you end up with indications of a flu pandemic…

Martin Bauch, Under the weather: Medieval diseases with low mortality and high contagion, in: Mittelalter. Interdisziplinäre Forschung und Rezeptionsgeschichte, 9. März 2020,

New Articles from Martin Bauch and Thomas Labbé

Martin Bauch, Gerrit Jasper Schenk (2019). Teleconnections, Correlations, Causalities between Nature and Society? An Introductory Comment on the “Crisis of the Fourteenth Century”

The introductory comment revisits older discussions in medieval studies about the “Crisis of the Fourteenth Century,” connecting it – as recent studies suggest – to a general increase in the intensity and frequency of natural extreme events between the turn of the century and the ravages of the Black Death in mid-century. New approaches to this period of transition examine how societal phenomena coincided with rapid or gradual environmental changes and attempt to establish the relationship between causality and correlation; these methods challenge – albeit without reverting to climatic or environmental determinism – established historiographical paradigms that have tended to explain social facts via other social facts (Durkheim). Hence, the introduction discusses new theoretical tools in environmental history like consilience, resilience, vulnerability, and man-nature-interaction models, such as, for example, those developed by the Vienna School (Winiwarter), but also approaches which have received less attention, like Luhmann’s ecological communication, the Panarchy model (Gunderson/Holling), and Lovelock’s Gaia hypothesis. In the interest of promoting a pragmatic heuristic perspective, the editors expand on the idea of societal teleconnections of meteorological extreme events (Moser/Finzi Hart), as this concept integrates delayed effects and feedback loops, acknowledges spatial crosslinks, and avoids hierarchical impact-levels. Applying the meteorological term “teleconnection” in social historical studies allows for the discovery of “strange parallels” (Lieberman) in the socio-economic development of otherwise unconnected areas of the world, and these synchronicities, in turn, open avenues for the further development of a global pre-modern environmental history.

Martin Bauch, Gerrit Jasper Schenk (2019). Teleconnections, Correlations, Causalities between Nature and Society? An Introductory Comment on the “Crisis of the Fourteenth Century”. In: Martin Bauch, Gerrit Jasper Schenk (Eds.), The Crisis of the 14th Century: Teleconnections between Environmental and Societal Change? (pp. 1–23). Berlin, Boston: De Gruyter.

Thomas Labbé: The Crisis of 1315–1322 in Bresse as Depicted in Manorial Rolls

This paper assesses the severity of the crisis of 1315-1322 in the Bresse region of France. The economic documentation for this region is exceptionally good during the period in which it was under the control of the Duchy of Savoy. The accounts of many castellanies are continuously preserved from the end of the thirteenth century to the fifteenth century, which makes it possible to analyze the potential impact of the Dantean anomaly on the rural economy of this region in full detail. To date, scholars have never studied the impact of the depression of 1315-1322 in this region. This paper presents a classical analysis of four series of manorial rolls (Jasseron, Treffort, Pont d’Ain, and Pont-de-Vaux) for the period of 1300-1330. Particular attention is given to variations in crop yields and vineyard production, as well as to price fluctuations and the indirect demographic evidence that the rolls provide.

Thomas Labbé (2019). The Crisis of 1315–1322 in Bresse as Depicted in Manorial Rolls. In Martin Bauch, Gerrit Jasper Schenk (Eds.), The Crisis of the 14th Century: Teleconnections between Environmental and Societal Change? (pp. 130–152). Berlin, Boston: De Gruyter.

NEW: The Crisis of the 14th Century. Teleconnections between Environmental and Societal Change?

Finally out:

Bauch, Martin; Schenk, Gerrit J. (eds.), The Crisis of the 14th Century. Teleconnections between Environmental and Societal Change?, Berlin; Boston 2019 (Das Mittelalter. Perspektiven mediävistischer Forschung. Beihefte, 13). Open Access here:

Pre-modern critical interactions of nature and society can best be studied during the so-called “Crisis of the 14th Century”. While historiography has long ignored the environmental framing of historcial processes and scientists have over-emphasized nature’s impact on the course of human history, this volume tries to describe the at times complex modes of the late-medieval relationship of man and nature. The idea of ‘teleconnection’, borrowed from the geosciences, describes the influence of atmospheric circulation patterns often over long distances. It seems that there were ‘teleconnections’ in society, too. So this volumes aims to examine man-environment interactions mainly in the 14th century from all over Europe and beyond. It integrates contributions from different disciplines on impact, perception and reaction of environmental change and natural extreme events on late Medieval societies. For humanists from all historical disciplines it offers an approach how to integrate written and even scientific evidence on environmental change in established and new fields of historical research. For scientists it demonstrates the contributions scholars from the humanities can provide for discussion on past environmental changes


St. Mary Magdalene’s Flood (1342) at the Intersection of Environmental History and the History of Infrastructures: A Compound Event as a Catalyst of Medieval Infrastructure Development and Public Welfare

Reconstruction of the flood wave in July 1342 for the Main basin. Destroyed bridges in red. Map: Martin Bauch Quelle: Wikimedia Commons: CC BY-SA 3.0)

This recently published  article (in German) sheds new light on the disastrous event of St Mary Magdalene’s Flood in Central Europe in 1342, which scholars have thus far largely neglected, by examining administrative documents like charters and accounts for the first time, while also considering scientific proxy data like precipitation reconstructions based on tree rings. The result is a much more nuanced reconstruction of these two years that included extreme flooding (in February and July 1342 and July 1343), but also pronounced dryness in spring 1342, which might explain the extreme erosion events geomorphologists attribute to the strong precipitation of these years. The events of 1342/43 are a good example of how a pre-modern, multi-factorial compound event could have disastrous consequences when natural extreme events and disadvantageous socio-economic conditions coincided. Examining a wider variety of written sources reveals that the supra-regional dearth and famine in Central Europe was linked to the fact that the flood occured before grain could be harvested in 1342. Furthermore, the article focuses on infrastructural adaptions like changes in bridge design or large water-infrastructures, as well as on normative reactions at a regional or local level that can be understood, at least partially, to have been caused by the flood disaster. These processes of technological and normative adaption can be understood, on the one hand, as second-order-perceptions of nature in Luhmann’s sense; on the other hand, they illustrate the importance of natural extreme events as a catalyst for pre-modern development of infrastruture. In the aftermath of 1342/43, areas to the north of the Alps implemented flood-protection measures to protect the public welfare for the first time, at least such initiatives that went beyond local responses to involve regional and supra-regional powers up to and including the Holy Roman Emperor.

Balduin Bridge over the river Mosel in Koblenz, built in 1341 to 1358 – and most possibly hit (and influenced in its design) by the flood events of 1342/43. Source: Wikimedia Commons, public domain.

Full article (in German) – read only version here.

Bauch, Martin, Die Magdalenenflut 1342 am Schnittpunkt von Umwelt- und Infrastrukturgeschichte: Ein compound event als Taktgeber für mittelalterliche Infrastrukturentwicklung und Daseinsvorsorge, in: NTM. Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin 27/3 (2019), S. 273-309.

Grape Harvest Dates from Burgundy demonstrate (once more) Global Warming since the End of the 20th Century


Organisation of the harvest in 1487; page from the accounting book of the Church of Notre-Dame of Beaune (Archives départementales de la Côte d’Or, B 2918/109)

Records of grape harvest dates (GHD) are the oldest and the longest continuous phenological data in Europe. They have been repeatedly used since the end of the 19th century to reconstruct past climate variations, and in the two last decades to reconstruct spring-summer temperature beyond the instrumental period. Newly, the GHD from the famous vine region of Beaune (Burgundy) between 1354 and 2018 have been entirely drawn from the archives and published in the European Geoscience Union journal Climate of the Past. It constitutes the worldwide longest GHD series in the literature and one of the longest phenological records ever. The 664-year-long Beaune series has been cross-checked with the April-to-August Paris temperature series comprising the 360 years from 1659 to 2018 (R = -0,76), as well as with tree-ring series, with documentary proxy evidence and with the Central European temperature series (from 1500). Statistical models show that the series is very reliable to reconstruct April-to-August temperature in the long run. Of major interest, the series is clearly subdivided into two parts. From 1354 to 1987 grapes were on average picked from 28 September on, whereby during the last 31-year long period of rapid warming from 1988 to 2018 harvests began 13 days earlier. The 33 earlier harvest dates of series are unevenly distributed over time. 26 of them occurred between 1393 and 2002, whereby since the hot summer 2003, 8 out of 16 spring-summer periods were outstanding according to the statistic of the last 664 years. In the Paris temperature measurements since 1659, April-to-July temperature reached the highest value ever in 2018. In sum, the 664-year-long Beaune GHD series demonstrates that outstanding hot and dry years in the past were outliers, whereby they became the norm since the transition to rapid warming in 1988.

Beaune GHD time-series, with indication of the 33 earlier dates (Labbe et al. 2019, p. 1496).

To know more: Labbé, T., Pfister, C., Brönnimann, S., Rousseau, D., Franke, J., Bois, B.: The longest homogeneous series of grape harvest dates, Beaune 1354-2018, and its significance for the understanding of past and present climate, Climate of the Past, 15, 1485-1501,, 2019.

Find here a podcast interview with Thomas Labbé (in German) by

Falcons in the Territory of the Teutonic Order and the Duchy of Prussia

by Marie-Luise Heckmann (University of Potsdam) with the assistance of Dieter Heckmann (Secret State Archive of Prussian Cultural Heritage, Berlin)

Old-French translation of Emperor Frederick II’s ‘De arte venandi cum avibus’, depicting falcons given as a present to a ruler, Bruges around 1482. Source: Wikimedia commons, public domain

The present article addresses the topic of “Falcons in the Orderland and Duchy of Prussia” in regard to the interplay between humans and animals. The hawks (i.e. peregrine, gyrfalcon) serve as climate indicators on the one hand, and as examples for the price of rank and status in the political game of power on the other hand. Depending on the respective onset of winter, they turn out to be ecologically and economically scarce, which caused a need to budget

The ecological costs of falconry and the export of hawks of the Prussian rulers can be quantified with the respective weather and the resulting number of hawks, which arrived between late August and mid-December in Old Prussia. The lack of animals and the annual dates of bird migration resulted mainly from the weather phenomena on the Kola Peninsula in June, July and August of each year. The Fennoscandian climate is likely – as it is today – to have alternated with the weather in Central Europe. Frostbursts and gusty winds in summer on the Kola peninsula were probably associated with frequent northwest current high-pressure conditions in central Europe, as a rainy summer in Central Europe often correlates with a significant decline in falcons in the following autumn.

The beginning of winter, and here the hawks prove to be climate indicators, was indicated by their departure as soon as the water began to freeze. The pivotal point of this article is: The earlier winter began, the earlier the falcons left Prussia, Lithuania and Livonia. The onset of winter, looking at the falcon’s catching dates, moved from the end of the 14th century to the second third of the 16th century on average by about four weeks, from the third week of November to the third week of October. The reason for this was evidently the beginning of the Little Ice Age.

The regional fishing dates also show hawks migrating in the wake of their prey – small and medium-sized birds – from the inland lakes and rivers, where they arrived in late summer, to the Baltic Sea coast, which they left at the onset of winter. For a particularly long time, the mild climate of the Curonian Spit influenced by the effects of the Gulf Stream (long hours of sunshine, warm water) allowed the hawks to find food. Thus, the falcon in Prussia can provide basic knowledge about the historical migration of birds before the age of ringing.

Hawks have been investigated for Prussia mainly in terms of hunting, catching and killing, as well as princely gifts and diplomatic exchanges. The Great “Marienburger Tresslerbuch” (a special account book, 1398-1409) allows not only important insights into the scope and costs, but also into the methods of falcon-catching and the addressee of the falcon gifts of the Grand Master respective the Duke in Prussia. The falcon letters, several falcon lists and individual contracts with falconers, which are quite often used since the end of the 14th century, make it possible to limit the fishing times, as well as to reconstruct the falconers’ travel routes to Western and Central Europe.

The economic costs of politically-diplomatically motivated Hawk gifts for Western and Central European princes included the catch premiums and the travel,  and subsistence costs of the falconer and his animals. In Mark Prussian, they were in the lower to middle double digits and can be seen as a contribution to peacekeeping, for timely information and for the (occasional) participation in the political power game of their time. In other words, a hawk for the French king is just a fifth to a quarter as much as a stallion for the battle.

In Preparation in Polish: Sokoły w państwie krzyżackim i księstwie pruskim – rzadkie dobro ekologiczne i ekonomiczne, in Człowiek – Klimat – Przyroda. Perspektywa antropocentryczna [Man, climate, nature. An anthropocentric perspective], ed. Piotr Oliński / Wojciech Piasek, Toruń.

Already published in German: Falken im Ordensland und Herzogtum Preußen – ein ökologisch und ökonomisch knappes Gut, in Jahrbuch Preußenland 8 (2017), pp 7-40.