Please specify one of the 13 popes named Leo.
Leo I aka Saint Leo aka Leo the Great
Pope Leo X was responsible for the rebuilding of Saint Peter's Basilica in Rome.
Saint Leo the Great was declared a Doctor of the Church by Pope Benedict XIV in 1754.
If this is in reference to the 13 Leos, the first was Pope Leo I, the Great who ruled the Church from 440 to 461.
If you are referring to Pope Saint Leo I, he is a Doctor of the Church but not a patron saint.
The Eastern Orthodox Church.
There is no 'pope of Rome.' The popes are of the Universal Church. Pope Leo XIII was in office in 1892.
Which of the 13 popes named Leo are you referring to? Be specific.
Pope Saint Leo the Great is not a patron saint.
Saint Peter's Basilica.
Pope St. Leo I, the Great, is a Doctor of the Church but not considered a patron saint.
Pope Leo XIII