John Italus, who lived from around 1025 until sometime after 1082, was a Byzantine philosopher of Calabrian origin who revived Neoplatonic thought in Constantinople during the eleventh century. He studied under Michael Psellos and succeeded him as Chief of the Philosophers, leading a well attended school where he taught the works of Proclus, Plato, Iamblichus, Porphyry and Aristotle, excelling especially in logic and Aristotelian philosophy though weaker in grammar and rhetoric. His teaching drew ecclesiastical scrutiny under Emperor Alexios I Komnenos, and after being brought before an ecclesiastical court around 1076 to 1077 he was compelled to publicly retract eleven propositions judged heretical. By 1082 he was anathematized and banished to the Monastery of Zoodochos Pege, though his sentence was later moderated after he professed genuine repentance.
Facts
Defining MomentAwarded the honorary title Chief of the Philosophers 1 Defining MomentCondemned in 1082 after conflict with Alexios I Komnenos 2 Office HeldHead of the philosophical school, Constantinople (succeeded Psellus) 1 Classification
NationalityAncient Greece (Historical) 1 NationalityByzantine Empire (Historical) 2 Tradition
Tradition (category) Tradition (category) Connections
In Tradition
Entity-backed identity for the tradition-category enum value this philosopher already carries, resolved to a philosophy school by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The tradition fact itself, with its own citation, stays on the philosopher unchanged.
Entity-backed identity for the tradition-category enum value this philosopher already carries, resolved to a philosophy school by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The tradition fact itself, with its own citation, stays on the philosopher unchanged.
In the Other Atlases
Sources
1. John Italus - Wikipedia
Life, Background
John Italus was born in Italy from where he derived his name.
Lead, Position
He succeeded Psellus in his position as head of the philosophical school.
Life, Academic title
Italus obtained the honorary title of 'Chief of the Philosophers' (ὕπατος τῶν φιλοσόφων).
Lead section, nationality sentence
John Italus or Italos (Greek: Ἰωάννης ὁ Ἰταλός, Iōánnēs ho Italós; Latin: Johannes Italus; c.
View the Source2. John Italos, Wikipedia
Lead paragraph
He was a Byzantine Neoplatonic philosopher
Trial
In 1082 he was personally condemned, having come into conflict with Emperor Alexios I Komnenos.
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