1. University of Pennsylvania, Ms. Coll. 742 Folder 117 DS ID: DS1819 Title: Notarial document Author: Girolamo Piccolomini Date: 1509.
2. University of Pennsylvania, Ms. Coll. 742 Folder 34 DS ID: DS1853 Title: Notarial document Author: Università de' mercanti (Siena) Date: 1439.