1. University of Pennsylvania, Ms. Coll. 742 Folder 29 DS ID: DS1847 Title: Petition Author: Giovanni Piccolomini Date: 1421.
2. University of Pennsylvania, Ms. Coll. 742 Folder 33 DS ID: DS1852 Title: Petition Author: Simone di Nicolo Petroni Date: 1439.
3. University of California, Berkeley, BANC MS UCB 246 DS ID: DS12400 Title: Petition Place: PisaItalyRome Date: 1474