Gregory XIII | |
|---|---|
| Bishop of Rome | |
 | |
| Church | Catholic Church |
| Papacy began | 13 May 1572 |
| Papacy ended | 10 April 1585 |
| Predecessor | Pius V |
| Successor | Sixtus V |
| Previous post(s) |
|
| Orders | |
| Ordination | 31 July 1558 by Girolamo Maccabei |
| Consecration | 6 August 1558 by Girolamo Maccabei |
| Created cardinal | 12 March 1565 by Pius IV |
| Personal details | |
| Born | Ugo Boncompagni 7 January 1502[a] |
| Died | 10 April 1585 (aged 83) Rome, Papal States |
| Alma mater | University of Bologna |
| Motto | Aperuit et clausit ("Opened and closed") |
| Signature |  |
| Coat of arms |  |
| Other popes named Gregory | |
| Papal styles of Pope Gregory XIII | |
|---|---|
| |
| Reference style | His Holiness |
| Spoken style | Your Holiness |
| Religious style | Holy Father |
| Posthumous style | None |
Pope Gregory XIII (Latin: Gregorius XIII; Italian: Gregorio XIII; 7 January 1502 – 10 April 1585),[b] born Ugo Boncompagni, was head of the Catholic Church and ruler of the Papal States from 13 May 1572 to his death in April 1585. He is best known for commissioning and being the namesake for the Gregorian calendar, which remains the internationally accepted civil calendar to this day.
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