Pope Leo I was declared a saint by general acclamation - precongregational. In other words, before there was a formal canonization process, as were nearly all the early saints. Often these proclamations came from a local bishop. Sometimes these bishops proclaimed saints whose lives were far from saintly, however. It was not until the 12th and 13th centuries that a formal process began to be instituted by Rome and removed this authority from local clergy. However, Pope Benedict XIV, in 1744, bestowed on Leo I the title of "Doctor of the Church" thus confirming his saintly status.
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.
There was a Pope Leo XIII but he has not been canonized as a saint.
Leo the Great was neither beatified nor canonized. The official canonization process did not exist at the time. He was proclaimed a saint by the early Christians based on his life and merits.
No, Pope Leo XII has not been canonized.
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.
Saint Rita of Cascia was canonized on May 24, 1900, by Pope Leo XIII.
Saint Rita of Cascia was canonized on May 24, 1900, by Pope Leo XIII.
Pope Saint Leo the Great is not a patron saint.
Saint Leo the Great Parish was created in 1921.
Peter Claver was canonized on January 15, 1888, by Pope Leo XIII.
Pope St. Leo I, the Great, is a Doctor of the Church but not considered a patron saint.
Blessed Rosalina of Villeneuve is not yet a saint. She was beatified in 1851. That is the stage of canonization just below saint.