1. University of Pennsylvania, Ms. Codex 1231 DS ID: DS972 Title: Works on civil law Author: Alberto Cattani Place: Siena and Pavia Date: 1466-1468
2. University of Pennsylvania, Ms. Codex 1249 DS ID: DS984 Title: Contract Author: Pius III Place: Siena Date: between 1492 and 1502. 1502?