Description

Pope Gregory XIII issues a papal bull, or edict, outlining his calendar reforms, because the old Julian Calendar has an error rate of one day in every 128 years

Location

Rome

Rate

Very important (8)

Sphere

Religion, Inventions

Images

Christopher Clavius, one of the main authors of the Gregorian calendar Pope Gregory XIII in an early 17th century engraving First page of the papal bull Inter gravissimas, introducing the Gregorian Calendar

Comments