Discussion of the Reform of the Calendar under Pope Gregory XIII (1502-85) replaced by t...
Italian School, (16th century)
Portrait of Pope Gregory XIII (Ugo Buo...
Fontana, Lavinia (1552-1614)
Pope Gregory XIII (1502-1585), Portrai...
Pope Gregory XIII (1502-1585). Portrai...
European School, (19th century)
Pope Gregory XIII.
Pope Gregory XIII chairing the commission for reforming Roman Calendar (1582-1583), illu...
Portrait of Pope Gregory XIII, three-q...
An antipapal satire depicting Queen Elizabeth I and Pope Gregory XIII, 1754
Marble monument of Pope Gregoire XIII ...
Pope Gregory XIII, 1502 1585, born U...
Pope Pope Gregory XIII (1502-1585) rec...
Gregoire XIII (Ugo Boncompagni, 1502-1...
Japanese ambassadors prostrate at the feet of Pope Gregory XIII in 1585, 1850 (hand-colo...
Spanish School, (19th century)
French School, (16th century)
Tomb of Gregory XIII, 1720-1723, marbl...
Gregoire XIII (Ugo Boncompagni, 1502-1585), pope from 1572 to 1585, promulgating the new...
Portrait of Pope Gregory XIII (1502-15...
Passarotti, Bartolomeo (1529-92)
Portrait of Gregory XIII (1502 - 1585).
The miracle of Pope Gregory's mass, ca...
Tomb of Pope Gregory XIII (Good Fellow...
Autograph: Philip II of Spain, 1579.
Portrait of Ugolino of Anagni
Pope Gregory XIII (engraving)
Unknown Artist, (19th century)
Gregory XIII, bronze statue, by Alessa...
medal with the effigy of pope Gregory XIII in 1572-1585
The Rebellion of Northumberland and Westmoreland; The Treacherous Practice of Don John o...
Danckerts, Cornelis I (c.1603-56)
St. Gregory the Great and Peter the Deacon, miniature from Dialogorum libri quattuor, ma...