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. University of California, Berkeley, BANC MS UCB 172 DS ID: DS12364 Title: Privilege Author: Alfonso X of Castile and Leon Date: 1256 Oct. 24].