The Christian era at Petra came during the 3rd, 4th and 5th centuries, when the area came under Byzantine control. Although the city remained mainly pagan, there were three churches and a cathedral of sorts… an old tomb was turned into a small cathedral. In addition, some tombs later had crosses inscribed into their walls. When considering a map of Petra, it appears that there was a small Christian sector, with the three churches built almost side by side, and near the Urn Tomb cathedral. To the north of the churches one finds the Christian tombs. The rest of Petra appears to have remained pagan, with the temples being in operation until the very end of Petra, when it was occupied by Muslim forces.