Death of Pope Gregory XIII - April 10 RealCatholicTv on Oct 28, 2011 Pope Gregory XIII, the man responsible for the Gregorian calendar, died on this day in history, 1585 ADMore
Death of Pope Gregory XIII - April 10
RealCatholicTv on Oct 28, 2011 Pope Gregory XIII, the man responsible for the Gregorian calendar, died on this day in history, 1585 AD
RealCatholicTv on Oct 28, 2011 Pope Gregory XIII, the man responsible for the Gregorian calendar, died on this day in history, 1585 AD