1. University of Pennsylvania, Ms. Coll. 742 Folder 19 DS ID: DS1836 Title: Petition Author: Carlo Blasii de Piccolomini Date: 1368-1371.
2. University of Pennsylvania, Ms. Coll. 742 Folder 9 DS ID: DS1920 Title: Notarial document Author: Podestà of Monticchiello (Italy) Date: 1293.