Pope Gregory XIII gave us the leap year – but his legacy goes so much further
Gregory III and the Foreign Communities in Rome | Bibliotheca Hertziana – Max Planck Institute for Art History
Tomb of Gregory XIII by RUSCONI, Camillo
The Tomb of Pope Gregory XIII - Inside The Vatican Pilgrimages
Pope Gregory XIII (1502-1585). Born Ugo Boncompagni. Pope from 1572-1585. Portrait. Engraving Stock Photo - Alamy
GREGORY XIII (1502-1585). Pope (1572-1585). Engraving
Gregory XIII (Pope) - On This Day
Portrait of Pope Gregory XIII (1502 - 1585) - The Online Portrait Gallery
Book of Hours of Gregory XIII « Facsimile edition
Pope Gregory Xiii Born Ugo Boncompagni Was Pope Of The Catholic Church From 13 May 1572 To His Death In 1585 Stock Illustration - Download Image Now - iStock
Monument to Pope Gregory XIII, Saint Peter's Basilica, The… | Flickr
Knights of the Altar - St Bartholomew Parish, Baao, CS - DID YOU KNOW: Pope Gregory XIII ordered to standardized the calendar because Julian calendar did not properly reflect the actual days
April 10 - Pope Gregory XIII - Nobility and Analogous Traditional Elites
Gregory XIII; Ugo Boncompagni (7 January 1502 to 10 April 1585) was Pope from 1572 to 1585; Historical; digitally restored reproduction from a 19th century original. - Album alb9818666
The Dragon and the Calendar - Pope Gregory XIII
Portrait of Pope Gregory XIII
Today in History, February 24, 1582: Pope Gregory XIII outlined Gregorian calendar
Gregory Conquers Julius Caesar - On This Day
Scipione Pulzone | PORTRAIT OF POPE GREGORY XIII (1502-1585) | MutualArt
EHS on X: "#OTD in history the Gregorian Calendar was introduced by Pope Gregory XIII... Did you know yesterday was the 4 October?!... back in 1582, that is. #churchhistory #religioushistory https://t.co/onqGvEoNux" /
Pope Gregory XIII - Simple English Wikipedia, the free encyclopedia
Pope Gregory XIII – Papal Artifacts
Gregory XIII | Biography, Papacy, Gregorian Calendar, & Facts | Britannica
Pope Gregory XIII - Wikipedia
On this day in 1582: Pope Gregory XIII announces the new Gregorian calendar
