He was born between 1014 and 1028 - the actual date is unknown.
Pope St. Gregory I, the Great, served as pope from September 3, 590, until his death on March 12, 604.
pope gregory riegned in 590-604 !!
Pope Gregory I died on 604-03-12.
Pope Gregory XI was born in 1336.
Pope Gregory XI died on 1378-03-27.
Urban V
Pope John XI was born in 910.
Pope Benedict XI was born in 1240.
Pope Gregory XI (1370-78) Pope Urban VI (1378-89)
Pope Leo XI was born on June 2, 1535.
Pope Pius XI was born on May 31, 1857.
Pope Innocent XI was born on May 16, 1611.
Pope Clement XI was born on July 23, 1649.
Pope Gregory III was born in 690.
Pope Gregory XII was born in 1326.
Pope Gregory V was born in 972.