Laboratory of Humanities

Thomas de Aquino Byzantinus

(cod. Metochii Sancti Sepulchri 415 (XVI s.), f. 1r; Thomas de Aquino, Summa contra Gentiles, Lib. I, cap. 1, translated by Demetrios Cydones)

Object and Aims

Scholastic thought in Late Byzantium is an area that remains largely unexplored. The influence of Thomas Aquinas’ (1225-74) writings on Byzantine intellectual circles, both Latinophile and Orthodox, has recently attracted revived interest among scholars. The project aims to contribute to the scholarly discussion by producing the source material for the study of this important subject, namely critical editions of Greek translations of, and commentaries on, various works by Thomas Aquinas composed by Byzantine scholars and theologians between the late thirteenth and fifteenth centuries. The majority of these texts remain hitherto unpublished, or partially edited, or published on the basis of a limited number of manuscripts, often lacking information on sources cited therein. Following standard modern methodology, the critical editions, prepared by doctoral students and scholars participating in our project, are based on all extant manuscripts; they comprise a short introduction on the text and the manuscript tradition, while the text is accompanied by an apparatus fontium identifying sources and an apparatus criticus recording all palaeographical and textual phenomena. An index verborum, an index locorum and facsimiles of selected folios of the extant manuscripts are also included. The editions of these texts will shed more light on the philosophical and theological dialogue among distinguished scholars and theologians in the Greek East and the Latin West in a period of intensive intellectual creativity. In this sense, the publication of these texts, in both printed and electronic form, will become an indispensable tool for scholars and students of Byzantine and Western European history and thought.

Host Institutes

Collaborating Research Institutes (in alphabetical order)


Hellenic Ministry of Culture (2009-10)
Hellenic Ministry of Finance (2007-08)

Senior academics (in alphabetical order)

Professor Linos G. Benakis (Athens)
Professor Andreas Speer (Cologne

Advisory Board (in alphabetical order)

Professor Juan Nadal-Cañellas S.J. (Rome)
Dr Charalambos Dendrinos (London)
Professor Sten Ebbesen (Copenhagen)
Professor Georgi Kapriev (Sofia)
Professor Stylianos G. Papadopoulos (Athens)
Professor Gerhard Podskalsky S.J. (Frankfurt-am-Main)
Professor Rosario Scognamiglio O.P. (Bari)
Professor Franz Tinnefeld (Munich)


Dr John A. Demetracopoulos (University of Patras)

Research team (in alphabetical order)

Dr Marie-Hélène Blanchet (Paris))
Dr Charalambos Dendrinos (London) )
Professor John Monfasani (New York) )
Dr Konstantinos Palaiologos (London)
Mr Vasos Pasiourtides (MPhil/PhD student, London)
Assoc. Prof. Denis Searby (Upssala)
Assoc. Prof. Apostolos Spanos (University of Agder, Norway)
Dr Christos Triantafyllopoulos (London)
Dr Michele Trizio (Bari / Washington)
Dr Christopher Wright (London)


Series prima: Thomas de Aquino Graecus

Vol. I: Summa contra Gentiles (cum Bernardi Guidonis’ Vita S. Thomae Aquinatis, capp. 53-54)

Pars 1: Liber I
Pars 2: Liber II
Pars 3: Liber III
Pars 4: Liber IV

Vol. II: Summa theologiae

Pars 1: Pars Ia (ed. Chr. Wright)
Pars 2: Pars Ia IIae
Pars 3: Pars IIa IIae
Pars 4: Pars IIIa (qq. 1, 45, 49, 54, 55)
Pars 5: Supplementum (76 qq.)

Vol. III: Quaestiones

Pars 1: De potentia (ed. A. Spanos)
Pars 2: De spiritualibus creaturis

Vol. IV: Opuscula apologetica et polemica

Pars 1: De rationibus fidei ad cantorem Antiochenum (ed. M.-H. Blanchet)
Pars 2: De articulis fidei et Ecclesiae sacramentis (ed. Ch. Dendrinos)
Pars 3: De aeternitate mundi

Vol. V: Opuscula philosophica

Pars 1: De ente et essentia (cum Commentario Armaduri de Bellovisu)
Pars 2: De fallaciis (dub.)

Vol. VI: Commentaria in Aristotelem

Pars 1: In Aristotelis “De Interpretatione”
Pars 2: In Aristotelis “Physicam”
Pars 3: In Aristotelis “De anima”
Pars 4: In Aristotelis “Metaphysicam”, prooemium

Vol. VII: Opuscula symbolica et liturgica

Pars 1: Expositio super Symbolum Apostolorum; Confessio (sp.) (ed. K. Palaiologos)
Pars 2: Sermo de festo corporis Christi; Pange lingua (ed. K. Palaiologos)

Vol. VIII: Compendia, florilegia, extracta

Pars 1: Compendia Scholarii. Compendium Summae contra Gentiles; Compendium Iae Partis Summae theologiae; Compendium Iae Partis IIae Partis Summae theologiae
Pars 2: Bessarionis Compendium quaestionum 1-7 Iae IIae Summae theologiae
Pars 3: Florilegia tria Scholarii ex Summa contra Gentiles necnon ex Summa theologiae contracta
Pars 4: Extracta Plethonis ex Summa contra Gentiles necnon ex Summa theologiae

Series altera: Thomas de Aquino a Byzantinis receptus

Vol. I: Demetrii Cydonis Defensio Sancti Thomae Aquinatis adversus Nilum Cabasilam (ed. D. Searby). In Appendice: Nili Cabasilae De processione Spiritus sancti, Pars III: Quod impossibile est Latinos syllogismis utentes Spiritum sanctum ex Filio procedere demonstrare

Vol. II: Demetrii Chrysolorae Refutatio operis Demetrii Cydonis “Contra Nilum Cabasilam” sub forma dialogi, in quo auctor ipse cum personis Thomae Aquinatis, Nili Cabasilae et Demetrii Cydonis loquitur (ed. V. Pasiourtides)

Vol. III: Prochori Cydonis De essentia et operatione Dei (ed. Ch. Triantafyllopoulos)

Vol. IV: Matthaei Angeli Panareti Contra Thomae, auctoris Latini, de processione Spiritus sancti argumenta; De loco ignis purgatorii contra Thomam Aquinatem (ed. M.-H. Blanchet)

Vol. V: Callisti Angelicoudis seu Meleniciotae Contra Thomae, auctoris Latini, librum sub praetextu “Contra Gentiles” scriptum (ed. M. Trizio)

Vol. VI: Andreae Chrysobergae Apologia ad Bessarionem ex Thomae Aquinatis scriptis de divina essentia et operatione (ed. J. Monfasani)

Vol. VII: Marci Eugenici De resurrectione

Vol. VIII: Georgii Scholarii - Gennadii II De divina providentia et praedestinatione tractatus I-II

Vol. IX: Loci diversi ex Thomae de Aquino scriptis graece translatis a nonnullis auctoribus Byzantinis aut explicite aut implicite laudati (Simon Constantinopolitanus; Manuel Moschopoulos; Nilus Cabasilas; Nicolaus Cabasilas; Prochorus Cydones; Demetrius Cydones; Manuel Calecas; Joseph Bryennius; Macarius Macres; Manuel II Palaiologus; Marcus Eugenicus; Georgius Scholarius - Gennadius II; Georgius Gemistus cognomine Pletho; Bessarion; Matthaeus Camariotes et al.)


For further information on the project please contact Lecturer Dr John A. Demetracopoulos, Editor, Thomas de Aquino Byzantinus”, Department of Education, University of Patras, Rion 265 04, Greece, tel: +30 2610 969 776, fax: +30 2610 996 164; or Dr Charalambos Dendrinos, The Hellenic Institute, Royal Holloway, University of London, Egham, Surrey TW20 0EX, tel. +44 (0)1784 443791, fax +44 (0)1784 433032.