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Pope Gregory XIII
|Pope Gregory XIII|
|Bishop of Rome|
|Papacy began||13 May 1572|
|Papacy ended||10 April 1585|
|Created Cardinal||12 March 1565|
|Birth name||Ugo Boncompagni|
|Born||7 January 1502|
Bologna, Papal States
|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.
Pope Gregory was involved in Italian and European political disputes.
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.
- "Pope Gregory XIII," Catholic Encyclopedia; retrieved 2011-11-3.
- Society for the Diffusion of Useful Knowledge. (1838). "Gregory XIII," Penny cyclopaedia, Vol. 11, p. 446.
- "Gregory XIII (1502-1585)," Who's Who in Christianity; retrieved 2012-7-18.
- Society for the Diffusion of Useful Knowledge. (1839). "Kalendar," Penny cyclopaedia, Vol. 13, p. 172.
- St. Peter's Basilica, Monument to Gregory XIII; retrieved 2011-11-10.
- "Pope Gregory XIII". Catholic Encyclopedia. (1913). New York: Robert Appleton Company.
- "Gregory XIII", Encyclopædia Britannica, 1911
- Catholic Hierarchy, Pope Gregory XIII
- Cardinals of the Holy Roman Church, Cardinal Boncompagni
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