Pope Gregory XIII | |
|---|---|
| Bishop of Rome | |
| Diocese | Rome |
| See | Holy See |
| Papacy began | 13 May 1572 |
| Papacy ended | 10 April 1585 |
| Predecessor | Pius V |
| Successor | Sixtus V |
| Previous post(s) |
|
| Orders | |
| Ordination | c. 1558 |
| Consecration | 1558 |
| Created cardinal | 12 March 1565 by Pius IV |
| Personal details | |
| Born | Ugo Boncompagni 7 January 1502 |
| Died | 10 April 1585 (aged 83) Rome, Papal States |
| Motto | Aperuit et clausit ("Opened and closed") |
| Coat of arms | |
| Other popes named Gregory | |
Pope Gregory XIII (Latin: Gregorius XIII; 7 January 1502 – 10 April 1585), born Ugo Boncompagni, was the head of the Catholic Church from 13 May 1572 to his death in 1585. He is best known for commissioning and being the namesake for the Gregorian calendar, which remains the internationally accepted civil calendar to this date.
Ugo Boncompagni was born in 1502, in Bologna.
Pope Paul IV appointed him Bishop of Viesti in 1558.
In 1564, he was made a cardinal by Pope Pius IV.
Cardinal Boncompagni was elected Pope at age 70; and he chose to be called Gregory XIII.
Pope Gregory was involved in Italian and European political disputes.
He founded the Gregorian University in Rome.
In the last year of his life, Gregory received an embassy from Japan.
Pope Gregory is famous for his correction of mistakes in the Julian calendar. To accomplish the necessary changes, the Gregorian calendar skipped ten days between 4 October 1582 and 15 October 1582.

Media related to Gregorius XIII at Wikimedia Commons
| Preceded by Pius V |
Pope 1572–1585 |
Succeeded by Sixtus V |