- SaintGregory the Great, a.d. c540–604, Italian ecclesiastic: pope 590–604.
- Saint, known as Gregory the Great. ?540–604 ad, pope (590–604), who greatly influenced the medieval Church. He strengthened papal authority by centralizing administration, tightened discipline, and revised the liturgy. He appointed Saint Augustine missionary to England. Feast day: March 12 or Sept 3