ST LEO the great catholic church

St. Leo the Great was born in Tuscany. As deacon, he was dispatched to Gaul as a mediator by Emperor Valentinian III. He reigned as Pope between 440 and 461. He persuaded Emperor Valentinian to recognize the primacy of the Bishop of Rome in an edict in 445. The doctrine of the Incarnation was formed by him in a letter to the Patriarch of Constantinople, who had already condemned Eutyches. At the Council of Chalcedon this same letter was confirmed as the expression of Catholic Faith concerning the Person of Christ.

All secular historical treatises eulogize his efforts during the upheaval of the fifth century barbarian invasion. His encounter with Attila the Hun, at the very gates of Rome persuading him to turn back, remains a historical memorial to his great eloquence. When the Vandals under Genseric occupied the city of Rome, he persuaded the invaders to desist from pillaging the city and harming its inhabitants. He died in 461, leaving many letters and writings of great historical value. His feast day is November 10th.

from Wikipedia

Pope Leo I (c. 400 – 10 November 461), also known as Saint Leo the Great, was the head of the Catholic Church from 29 September 440 to his death in 461.[1]

He was an Italian aristocrat, and was the first pope to have been called "the Great". He is perhaps best known for having met Attila the Hun in 452 and persuading him to turn back from his invasion of Italy. He is also a Doctor of the Church, most remembered theologically for issuing the Tome of Leo, a document which was foundational to the debates of the Ecumenical Council of Chalcedon. The Council of Chalcedon, the fourth ecumenical council, dealt primarily with Christology, and elucidated the orthodox definition of Christ's being as the hypostatic union of two natures—divine and human—united in one person, "with neither confusion nor division". It was followed by a major schism associated with Monophysitism, Miaphysitism and Dyophysitism.