Johann Burchard served as master of ceremonies for Pope Alexander VI (Borgia) and was thus perfectly placed to closely observe the personalities and events at the papal court. His diary is one of the most useful historical sources of this period. Johann Burchard was the papal Master of Ceremonies from 1483 through 1503 when he died. He was the keeper of the papal ceremonial schedule and kept a diary of events for the last few months of the pontificate of Sixtus IV, the whole of those of Innocent VIII, Alexander VI, and Pius II, and the first years of the pontificate of Julius II. The whole of Burchard's diary is in the Vatican Library, and it is considered to be an authoritative source of papal history of its time. The Image shows an English language edition of part of his diary, concerning only the pontificate of Alexander VI Borgia, issued by the London Folio Society in 1963 and reissued in 1993.