Pope Gregory XIII

Pope Gregory 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.

Early life
Ugo Boncompagni was born in 1502, in Bologna. "Pope Gregory XIII," Catholic Encyclopedia; retrieved 2011-11-3. 

Bishop
Pope Paul IV appointed him Bishop of Viesti in 1558.

Cardinal
In 1564, he was made a cardinal by Pope Pius IV.  

Pope
Cardinal Boncompagni was elected Pope at age 70;Society for the Diffusion of Useful Knowledge. (1838).  "Gregory XIII," Penny cyclopaedia, Vol. 11, p. 446. 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. "Gregory XIII (1502-1585)," Who's Who in Christianity; retrieved 2012-7-18.

In the last year of his life, Gregory received an embassy from Japan.

 Gregorian calendar 
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.Society for the Diffusion of Useful Knowledge. (1839).  "Kalendar," Penny cyclopaedia, Vol. 13, p. 172.  
 1582 – Gregorian calendar reset, when 4 October was followed by 15 October. St. Peter's Basilica,  Monument to Gregory XIII; retrieved 2011-11-10.

Related pages
 List of popes

References

Other websites

   "Gregory XIII", Encyclopædia Britannica, 1911
  Catholic Hierarchy, Pope Gregory XIII
 Cardinals of the Holy Roman Church , Cardinal Boncompagni 

Category:1502 births
Category:1585 deaths
Category:Italian popes