Imperial politics and religious spaces in the 3rd century

Project management: Prof. Dr. Hartmut Leppin

The project represents a contribution to the new research focus “Post/Secularism”. The questions raised by the post-secularism debate also appear to be relevant to ancient history, even though the discussion is based on contemporary societies. This is because it reflects the problem of the relationship between religion and the public sphere and its transformation, which has a significance that transcends epochs.
The project continued research by Principal Investigator Hartmut Leppin on the thesis, inspired by the post-secularism debate, that the spread of Christianity generated a neutralization of certain spaces.

The project asked how religious diversity was dealt with in the Roman Empire after Christianity had become a prominent religion that claimed both universal validity and exclusive truth. The question of the role of justificatory narratives in the formation of a new normative order has proven to be extraordinarily fruitful, especially with regard to the significance of Christian narratives for the establishment of an empire that was not foreseen in Christian discourse. Furthermore, the project has contributed to the comparative perspective, in particular to critically reflecting on certain key concepts of the cluster, namely tolerance, recognition and post-secularism.

The work was carried out on the one hand through overarching activities of the project leader, and on the other hand through a series of special studies, partly by the project leader himself and partly by (associated) collaborators. Sophie Röder’s project was the most important of these: it examined the governmental practices of Roman emperors during the years 253-268. The rulers’ reactions to the spread of Christianity were examined on the basis of legislative decrees, which allowed important insights to be gained into the effect of religious diversity on normative orders. The thesis was submitted in January 2017.

Ms. Röder’s research cast doubt on the widespread thesis that decrees by Valerian (253-260) and Gallienus (253-268) triggered the first systematic persecutions of Christians. She was able to convincingly demonstrate that this perspective stems from the Christian tradition of the sources. Particularly important within Hartmut Leppin’s research is the observation that a temporary calm could be achieved through a policy of religious neutralization of certain areas and that in this context justification narratives emerged that to modern ears have the ring of tolerance.

The most important events in this project:

Panel discussion: In the name of God? Monotheism and violence Prof. Dr. Mouhanad Khorchide in conversation with Prof. Dr. Harmut Leppin (in the series Stadtgespräch of the Cluster of Excellence “The Formation of Normative Orders”), Historisches Museum, Frankfurt am Main, April 19, 2017.

Lecture series: Modelling Transformation (lecture series of the Cluster of Excellence “The Formation of Normative Orders”), with lectures by Prof. Dr. Wolfgang Knöbl, Prof. Dr. Rudolf Stichweh, Prof. Dr. Eva Geulen, Prof. Dr. Andrew Abbott, Prof. Dr. Lorraine Daston, Goethe University, Frankfurt am Main, summer semester 2016.

Frankfurt-Birmingham Study Day: Contesting the Sacred – Contexts of Greek and Roman Religion, University of Birmingham, December 4, 2015.

International Junior Researcher Workshop: Religious Differentiations in the Transition from the Imperial Period to Late Antiquity, Cluster of Excellence “The Formation of Normative Orders”, Goethe University, Frankfurt am Main, November 29-30, 2013.

The most important publications in this project:

*Leppin, Hartmut: “Christianity and the Discovery of Religious Freedom”, Rechtsgeschichte / Legal History 22, pp. 62-78. (French translation: “Le christianisme et la découverte de la liberté religieuse”, in: T. Itgenshorst and Ph. Le Doze (eds.): La norme sous la République et le Haut-Empire romains (Scripta antiqua 96), Bordeaux, 2017, pp. 217-237.

*Leppin, Hartmut: “Aspects of the Christianization of Foreign Policy in Late Antiquity: The Impact of Religious Universalism”, in: G. Hellmann/A. Fahrmeir/M. Vec (eds.): The Transformation of Foreign Policy. Drawing and Managing Boundaries from Antiquity to the Present Oxford: Oxford University Press, 2016, pp. 105-124.

Leppin, Hartmut: “Religiöse Vielfalt und öffentlicher Raum in der Spätantike”, in: M. Lutz-Bachmann (ed.): Postsäkularismus (Normative Orders vol. 7), Frankfurt am Main: Campus, 2015, pp. 335-360.

*Leppin, Hartmut: “Überlegungen zum Umgang mit Anhängern von Bürgerkriegsgegnern in der Spätantike”, in: K. Harter-Uibopuu and F. Mitthof (eds.): Forgive and forget? Amnesty in Antiquity. Contributions to the first Vienna Colloquium on Ancient Legal History (Wiener Kolloquien zur Antiken Rechtsgeschichte 1), Vienna, 2013, pp. 337-358; extended English version: “Coping with the Tyrant’s Faction: Civil War Amnesties and Christian Discourses in the Fourth Century AD”, in: J. Wienand (ed.): Contested Monarchy. Integrating the Roman Empire in the 4th Century AD Oxford: Oxford University Press, 2015, pp. 198-214.

Leppin, Hartmut: “Kaisertum und Christentum in der Spätantike: Überlegungen zu einer unwahrscheinlichen Synthese”, in: A. Fahrmeir and A. Imhausen (eds.): The diversity of normative orders. Conflicts and dynamics from a historical and ethnological perspective (Normative Orders Vol. 8), Frankfurt am Main, Campus, 2013, pp. 197-223.

people in this project:

Project management / contact person

Leppin, Hartmut, Prof. Dr.

Project staff

Röder, Sophie

News from the research center

Event
18.04.2026 | Frankfurt am Main

Das Prinzip Donald Trump und die Verrohung der Welt

Panel Discussion, Lecture

Ein neuer Politikstil macht international Karriere. Er ist gekennzeichnet von Vulgarität, Verrohung und erklärter Rechtsfeindschaft. Machtinteressen werden nicht mehr juristisch bemäntelt. Stattdessen wird das angebliche Recht des Stärkeren zur Staatsdoktrin gemacht – innenpolitisch wie außenpolitisch. Treibende Kraft hinter dieser Verrohung der politischen Sitten ist ein US-Präsident, der nicht nur die amerikanische Gesellschaft und Kultur, sondern auch die globale Ordnung nach seinen Vorstellungen und Interessen umgestaltet. Die Römerberggespräche wollen diesen Politikstil verstehen.

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Event
29.04.2026 | Frankfurt am Main

Kulturindustrie heute?

Panel Discussion

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Event
20.03.2026 | Frankfurt am Main

40 Jahre Schengen-Raum

Colloquium

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News
12.02.2026

Satanist politics and the decline of reason in liberal democracies

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News
09.02.2026

On the topicality of the concept of violence based on Camus and Derrida

Prof. Dr. Christine Abbt from the University of St. Gallen gave a lecture on democracies and the concept of violence as part of the lecture series "At the crossroads? On the crisis of democracy", she gave a lecture on democracies and the concept of violence. Under the title "Defending democracies. On the topicality of the concept of violence in Camus and Derrida", the philosopher discussed forms of violence and revolt and categorized them with regard to a democratic setting.

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Publication
04.02.2026 | Journal article

New Perspectives on Trust in International Conflicts

Wille, Tobias; Simon, Hendrik; Daase, Christopher; Deitelhoff, Nicole; Wheeler, Nicholas J.; Holmes, Marcus; Rathbun, Brian C.; Acharya, Amitav; Mitzen, Jennifer (2026): „New Perspectives on Trust in International Conflicts“. In: International Studies Review 28 (1), viaf027.

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News
02.02.2026

States competing for people - David Owen on civil geopolitics

As part of the lecture series "At the Crossroads - The Future of Democracy", David Owen from the University of Southampton presented his concept of civil geopolitics.

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News
20.01.2026

Christine Hentschel on reorientation in catastrophic times

As part of the lecture series "At the crossroads? On the crisis of democracy", the sociologist spoke about living in and dealing with catastrophic times. Against the backdrop of the destruction of living conditions, wars, permanent crises and threats to democracy, Hentschel addressed the infiltration of the catastrophic into everyday social life and a changing activist and literary approach to the future.

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Publication
08.01.2026 | Journal article

Gender Differences in Financial Advice

Bucher-Koenen, Tabea; Hackethal, Andreas; Koenen, Johannes; Laudenbach, Christine (2025): „Gender Differences in Financial Advice“. In: American Economic Review, 115 (12), pp. 4218–4252.

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