All across the Empire, massive church buildings were erected by emperors. Right from the beginning of “official” Christianity, Constantine financed construction of huge churches, including the Basilic...All across the Empire, massive church buildings were erected by emperors. Right from the beginning of “official” Christianity, Constantine financed construction of huge churches, including the Basilica of St. Peter in what is today the Vatican. The traditional Roman public buildings, including forums, theaters, bathhouses and so on, were often neglected in favor of churches, and many temples to Roman gods and other public buildings were repurposed as churches.