This approval of slavery was reaffirmed and extended in the Romanus Pontifex bull of 1455 (also by Nicholas V).
In the bulls Dum diversas (1452) and Romanus Pontifex (1455) the right of taking pagans as perpetual slaves was granted to Christians.
Pontifex Maximus | Marius de Romanus | Romanus Pontifex | Romanus of Subiaco | Romanus of Condat | Quintus Mucius Scaevola Pontifex | ''populus Romanus'' (Roman people) | civis romanus sum |