the roots of romes leadership of the western church partially lie in
History of Rome The Empire's conversion to Christianity made the Bishop of Rome (later called the Pope) the senior religious figure in the Western Empire, as officially stated in 380 by the Edict of Thessalonica. In spite of its increasingly marginal role in the Empire, Rome retained its historic prestige, and this period saw the last wave of construction activity: Constantine's predecessor Maxentius built buildings such as its basilica in the Forum, Constantine himself erected the Arch of Constantine to celebrate his victory over the former, and Diocletian built the greatest baths of all. Constantine was also the first patron of official Christian buildings in the city. He donated the Lateran Palace to the Pope, and built the first great basilica, the old St. Peter's Basilica.