The coat of arms of Pope Gregory XIII (r. 1572-85) is displayed on the beautifully decorated wooden ceiling of the church of Santa Maria in Aracoeli.
Pope Gregory XIII is most famous for his reform of the calendar. The new calendar which came into existence in October 1582 is known as the Gregorian Calendar.
My name is David Lown and I am an art historian from Cambridge, England. Since 2001 I have lived in Italy, where I run private walking tours of Rome.
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