Today in History, February 24, 1582: Pope Gregory XIII outlined Gregorian calendar
File:Gregory XIII.jpg - Wikimedia Commons
February 9, 1581 Pope Gregory XIII, Creator of the Gregorian Calendar: A Signed Letter from 1581 – Papal Artifacts
Pope Gregory XIII - Wikipedia
Clavius with the image of pope Gregory XIII, the reformer of the... | Download Scientific Diagram
On this day in 1582: Pope Gregory XIII announces the new Gregorian calendar
Portrait of Pope Gregory XIII
The Tomb of Pope Gregory XIII - Inside The Vatican Pilgrimages
Gregory XIII (Pope) - On This Day
The Monument to Pope Gregory XIII in St Peter's Basilica in Rome - Walks in Rome (Est. 2001)
Gregory XIII | Catholic Answers
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
Gregorian calendar - Aleteia
184 Pope Gregory Xiii Stock Photos - Free & Royalty-Free Stock Photos from Dreamstime
Pope Gregory XIII: Accomplishments & Legacy | Study.com
The Dragon and the Calendar - Pope Gregory XIII
Gregory XIII | Biography, Papacy, Gregorian Calendar, & Facts | Britannica
Scipione Pulzone | PORTRAIT OF POPE GREGORY XIII (1502-1585) | MutualArt
Pope Gregory XIII (1502-1585). Born Ugo Boncompagni. Pope from 1572-1585. Portrait. Engraving. Colored. - SuperStock
Commission for the calendar reformation, under Pope Gregory XIII (1502-1585) the Julian Calendar was..., Stock Photo, Picture And Rights Managed Image. Pic. AHV-AGC-F-002022-0000 | agefotostock
The time the pope made 10 days disappear
Pope gregory xiii hi-res stock photography and images - Alamy
Anton Eisenhower Portrait of Pope Gregory XIII, 1581, 49×41 cm: Description of the artwork | Arthive
Gregory XIII (Pope) - On This Day
Gregory III and the Foreign Communities in Rome | Bibliotheca Hertziana – Max Planck Institut for Art History
