The bull is dated 1495 and is untranslated. The envelope is fairly fancy in and of itself and the document is made of parchment. The thread used is twine, signifying a document of lesser importance. It was addressed to a bishop.
This document is significant because it comes from the most notorious pope in at least 500, if not 1000, years. Although Pope Alexander VI was a talented, generous and wise patron of the arts, his personal life was highly immoral.
The papal bull is the particular type of letter issued by a pope that is authenticated by the bulla, the lead seal, appended to the end of it. This name was used for any document that contained a metal seal of this sort.