1. University of Pennsylvania, Ms. Coll. 742 Folder 17 DS ID: DS1834 Title: Records Author: Carlo Blasii de Piccolomini Date: 1363.
2. University of Pennsylvania, Ms. Coll. 742 Folder 19 DS ID: DS1836 Title: Petition Author: Carlo Blasii de Piccolomini Date: 1368-1371.