He was a correspondent of Bartholomaeus Fontius, a Florentine humanist who became one of the librarians for Matthias Corvinus, King of Hungary; through this connection at least six of Pietro Cennini's manuscripts produced for Matthias Corvinus, one with the dated colophonEscripsit Florentie petrus cenninius Anno Dominj 1467 VII. idus aprilis, from the Biblioteca Corvinianus are conserved in the National Széchényi Library and elsewhere. (Berkovits, Ilona (1964) Illuminated Manuscripts from the Library of Matthias Corvinus: (On-line extract. pp. 9-53)
