1. Harry Ransom Center, MS 3327, Container 191 DS ID: DS3960 Title: Papal bull Author: Gregory IX Place: Italy and Rieti Date: 1234 July 13
2. Harry Ransom Center, MS 3327, Container 196 DS ID: DS3982 Title: Papal bull Author: Sixtus IV Place: Italy and Rome Date: 1474 February 7