Pope Gregory XIII | |
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Bishop of Rome | |
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Diocese | Rome |
See | Holy See |
Papacy began | 13 May 1572 |
Papacy ended | 10 April 1585 |
Predecessor | Pius V |
Successor | Sixtus V |
Orders | |
Ordination | c. 1558 |
Consecration | 1558 |
Created cardinal | 12 March 1565 by Pius IV |
Personal details | |
Birth name | Ugo Boncompagni |
Born | 7 January 1502 Bologna, Papal States |
Died | 10 April 1585 (aged 83) Rome, Papal States |
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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.