Under the reign of Constantine Ducas, about A. D. 1060, instigated, it is said, by the fear lest the Saracens should in their conquests obliterate the records of the Christian faith, he compiled a work entitled, Πανδέκτης τῶν ἑρμηνειῶν τῶν θείων ἐντολῶν τοῦ Κυρίου. It consists of two books, and sixty-three chapters, containing extracts from the Scriptures, the ecclesiastical canons, the fathers, and other ecclesiastical documents, besides the civil law.

Fabricius (Bibl. Graec. vol. xi. p. 275, &c.) gives an account of the sources from which Nicon has drawn his extracts, as well as of other writings attributed to him.