Guillermo Menéndez Sánchez is an FWO Junior Postdoctoral Fellow in the History Department at Ghent University. He studied History at the University of Oviedo (Spain), where he earned his B.A. (2015), and Ancient History at Ca’ Foscari University of Venice (Italy), where he earned his M.A. (2018).
He completed his Ph.D. in 2022 with the project “The Sixth-Century Anti-Manichaean Polemic in the Light of the Main Greek-Language Sources: Tradition, Interpretation, Innovation,” jointly supervised by the University of Padua (Italy; supervisor: Vittorio Berti) and the École Pratique des Hautes Études (France; supervisor: Madeleine Scopello).
He is currently an FWO Junior Postdoctoral Fellow at Ghent University (2024–2026; 2027–2028) with the project “Coexistence, Conflict, Persecution: The Revival and Extinction of Manichaeism in the Eastern Mediterranean World” (promotor: Peter Van Nuffelen).
In 2025, he was awarded a Humboldt Postdoctoral Fellowship. Therefore, from 2026 onward he is also a Humboldt Fellow at the Georg-August-Universität Göttingen (2026–2027; 2028–2029) with the research line “Islamicate Manichaeism: a History across the Caliphal Realms (7th–10th centuries)” (promotor: Jens Scheiner).
Guillermo’s main research interests include Late Antiquity, the history of early Christianity, the history of Gnosticism, and Byzantine history. In particular, he focuses on the history of Manichaeism and the legacy this religious movement left in the society and culture of the Mediterranean world.