St. Leo IV, Pope

St. Leo IV was Pope from 847 to 855 AD. He was born in Rome and was known for his efforts to defend the Papal States against Saracen invaders. Leo IV strengthened the walls of Rome and commissioned the construction of the Leonine Wall to protect the Vatican. He also organized a naval force that defeated the Saracens at the Battle of Ostia in 849. St. Leo IV is venerated for his leadership during a tumultuous time and for his dedication to defending the Church and the city of Rome. He is the patron saint of Rome.