Pietro da Monterubbiano, OSA. Vita Sancti Nicolai Tolentinatis. Published in Laurentius Surius, Historiae seu Vitae Sanctorum vol. 9. Turin: Typografia Pontificia et Archiepiscopali, 1878.
Pietro da Monterubbiano wrote his life of St. Nicholas in 1326. The work remained in manuscript until Boninus Mombritius included it in his collection of lives of the saints published in Milan c. 1479. Laurentius Surius published a shortened version of the life in his series of lives of the saints in Cologne, 1570-1575. In turn, the Jesuit editors of the “Acta Sanctorum” published a life based on the above two works and some manuscripts. No modern critical edition of the life exists, but one is in preparation.