the revisionist school of Islamic studies, owing to claims of large numbers of independent pieces of evidence, namely that the early original mosques faced Petra, not Jerusalem or Mecca, as the direction of Muslim prayer, the Qibla. However, others have challenged the notion of comparing modern readings of Qiblah directions to early mosques’ Qiblahs as they claim early Muslims could not accurately calculate the direction of the Qiblah to Mecca and so the apparent pinpointing of Petra by some early mosques may well be coincidental. The Monastery, Petra's largest monument, dates from the 1st century BC. It was dedicated to Obodas I and is believed to be the symposium of Obodas the god. This information is inscribed on the ruins of the Monastery (the name is the translation of the Arabic Ad Deir). The Temple of the Winged Lions is a large temple complex dated to the reign of King Aretas IV (9 BC–40 AD). The temple is located in Petra's so-called Sacred Quarter, an area situated at the end of Petra's main Colonnaded Street consisting of two majestic temples, the Qasr al-Bint and, opposite, the Temple of the Winged Lions on the northern bank of Wadi Musa. Christianity found its way to Petra in the 4th century AD, nearly 500 years after the establishment of Petra as a trade centre. The start of Christianity in Petra started primarily in 330 AD when the first Christian Emperor of Rome took over, Constantine I, otherwise known as Constantine The Great. He began the initial spread of Christianity throughout the Roman Empire. 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). After the Islamic conquest of 629–632, Christianity in Petra, as of most of Arabia, gave way to Islam. 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 Catholic Church. According to Arab tradition, Petra is the spot where Musa (Moses) struck a rock with his