Outside the city walls, Emperor Costantine erected the first church dedicated to St Paul, Apostle of the Gentiles. In the courtyard the statue represents this energetic saint brandishing the sword and Letters. He, who using the words as “a sword” to convert the pagans, died by the sword as a Roman citizen. Throughout the century the Popes restructured it and embellished it with magnificent mosaics, frescoes and the famous series of papal portraits. Beneath the altar there are the sarcophagus of the Apostle and the shrine with his prison chains. But there is a lot more to see: St Stephen’s Chapel, dedicated to the first martyr; St Benedict’s Chapel and the Chapel of Relics which contains a lot of bone fragments of saints.