Life Isigonus of Nicaea (Ἰσίγονος ὁ Νικαεύς) was a paradoxographer from the city of Nicaea in Bithynia. He is dated to the 1st–2nd century CE based on citations by later authors like Phlegon of Tralles [1]. No details of his personal life or education survive.

Works His only known work is the lost Apista (Ἄπιστα), or "Unbelievable Things" [1, 2]. This collection of marvels belonged to the paradoxographical tradition, cataloging strange phenomena and monstrous creatures. Phlegon of Tralles cites it as a source for tales of hermaphrodites and ghostly apparitions [1].

Significance Isigonus’s significance lies in his contribution to paradoxography. His Apista served as a source for later compilers, reflecting the period's intellectual curiosity about the boundaries of the natural world. The work represents a blend of geography, ethnography, and folklore distinct from mainstream historical writing.

Sources 1. Perseus Digital Library (Tufts University): https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0621%3Achapter%3D1 2. ToposText: https://topostext.org/people/1410