Pope Gregory XIII

Pope Gregory XIII (Latin: Gregorius XIII; 7 January 1502 – 10 April 1585), born Ugo Boncompagni, was head of the Catholic Church and ruler of the Papal States 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 day.

Pope

Gregory XIII
Bishop of Rome
DioceseRome
SeeHoly See
Papacy began13 May 1572
Papacy ended10 April 1585
PredecessorPius V
SuccessorSixtus V
Orders
Ordination31 July 1558
by Girolamo Maccabei
Consecration6 August 1558
by Girolamo Maccabei
Created cardinal12 March 1565
by Pius IV
Personal details
Birth nameUgo Boncompagni
Born7 January 1502
Bologna, Papal States
Died10 April 1585 (aged 83)
Rome, Papal States
Previous post(s)
  • Bishop of Vieste (1558–1560)
  • Legate to Spain (1565)
  • Prefect of the Apostolic Signatura (1565)
  • Cardinal-Priest of San Sisto Vecchio (1565–1572)
MottoAperuit et clausit
("Opened and closed")
Coat of arms
Other popes named Gregory