Instable Certainty (PLUS-6)

Additional project

How can I be certain about something? This project investigates the ideal of epistemic stability in medieval philosophical and theological debates.


Nutrition and Nutritive Soul in Aristotle and Aristotelianism (PLUS-5)

Additional project

Aristotle is one of the first philosophers who attribute special significance to the most basic part of the soul, namely, the nutritive part. The importance of this psychic part stems not only from the fact that it is possessed by all living things and constitutes a necessary prerequisite for the existence of the soul’s other parts, but also from the fact that it is responsible for the manifestation of a variety of vital functions, such as generation, nutrition, growth and cooling of the living body.

Diagrammatic issues concerning Aristotle (B-5-2-3)


This dissertation deals with diagrams in ancient Greek scientific texts, in particular in Aristotle’s logical and natural scientific writings. Because diagrams accompanying ancient texts are generally only found in hand-written texts from the Middle Ages, the question arises as to the existence and the original appearances of antique diagrams. This question can be investigated from explicit and implicit references in the ancient texts, which also give clues as to the various ways in which diagrams were used.

Galen, De locis affectis I-II (D-2-1-6)


This project aimed at creating a historical-critical edition of the first two books of the work “On The Affected Parts” by Galen of Pergamon. Alongside suitable consideration of all manuscripts, the text thus constituted was also developed with comments and a German translation.

Formale Theorien von Objekten in Raum und Zeit (D-3-4-1)


Within this dissertation project Oliver Janitza has worked out formal systems for Aristotle’s theories of time, of three-dimensionally extended bodies, and of change. These theories are formal versions of Aristotle’s theories as presented in the Physics.

This Ph.D. thesis was successfully completed in 2016.


Johannes Buridans Philosophie des Geistes (D-2-4-1)


This dissertation project concerned philosophical psychology and epistemology, and their metaphysical underpinnings in the late Middle Ages, focussing on critiques of cognitivist arguments for the immaterial nature of the human mind.

Ontology of Immaterial Causes (D-4-1)

Research project

Descriptions of heavenly realms and celestial topography can be traced back to the cultural milieu of Second Temple Judaism, which may have been influenced by Platonic and Neo-Platonic concepts. Cosmographic and cosmological ideas were further attested during Late Antiquity in Old and New Testament apocryphal writings and parabiblical compositions, such as the Book of the Secrets of Enoch (or 2 Enoch), Apocalypse of Abraham, Ascension of Isaiah, Third Baruch, Apocalypse of Paul, Apocalypse of the Virgin Mary, etc.), which survive in Slavonic recensions transmitted in the Byzantine Commonwealth. In some cases the Slavonic texts are the only surviving witnesses to the Semitic originals; otherwise they represent faithful reproductions of Greek (Byzantine) redactions.