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found its way into Petra in the 4th century AD, nearly 500 years after the establishment of Petra as a trade center. Athanasius mentions a bishop of Petra (Anhioch. 10) named Asterius. At least one of the tombs (the "tomb with the urn"?) was used as a church. An inscription in red paint records its consecration "in the time of the most holy bishop Jason" (447). The Christianity of Petra, as of north Arabia, was swept away by the Islamic conquest of 629–632. During the First Crusade Petra was occupied by Baldwin I of the Kingdom of Jerusalem and formed the second fief of the barony of Al Karak (in the lordship of Oultrejordain) with the title Château de la Valée de Moyse or Sela. It remained in the hands of the Franks until 1189. It is still a titular see of the Roman Catholic Church.[10]
According to Arab tradition, Petra is the spot where Moses struck a rock with his staff and water came forth, and where Moses' sister, Miriam, is buried.