Pope Gregory XIII
- Category : Religion-Popes
- Type : GP
- Profile : 1/3 - Investigating / Martyr
- Definition : Split - Small (2,16)
- Incarnation Cross : RAX Laws 4
Italian ecclesiastic, a Roman Catholic cardinal in 1565 and elected pope 13 May 1572. It was he who corrected the errors of the Julian calendar and introduced the calendar that bears his name.
Died 10 April 1585, Rome.