September 15: edit
- 608 - Saint Boniface IV becomes Pope.
- 921 - Saint Ludmila is murdered at the command of her daughter-in-law at Tetin.
- 1514 - Thomas Wolsey is appointed Archbishop of York.
- 1590 - Giambattista Catagna is elected as Pope Urban VII.
- 1644 - Giambattista Pamphilj becomes Pope Innocent X, succeeding Pope Urban VIII.