Leo was not formally canonized. He was proclaimed a saint by the early Christians. The canonization process was not instituted until about the 12th century.
Some popes from the fifth century were St. Anastasius I, St. Innocent I, St. Zosimus, and St. Boniface I. Some additional popes from the fifth century were St. Celestine I, St. Sixtus III, and St. Leo I.
Saint Rita of Cascia was canonized on May 24, 1900, by Pope Leo XIII.
Pope St. Leo the Great died 10 November, 461.
Pope Saint Leo the Great is not a patron saint.
St. Peter Claver was canonized as a saint by Pope Leo XIII on January 15, 1888.
Pope St. Leo I, the Great, in the 5th century.
St. Clare of Assisi was canonized on September 26, 1255, by Pope Alexander IV.
St. Etheldreda was canonized by Pope Celestine III in 1198.
Pope St. Leo I, the Great, is a Doctor of the Church but not considered a patron saint.
The feast day of Pope Saint Leo the Great is November 10.
Pope John XXII canonized St. Thomas Aquinas in 1323.
St. Catherine of Siena was canonized by Pope Pius II on June 29, 1461.