Matriarchs. The Isaac Hall now serves as the Ibrahimi mosque, while the Abraham and Jacob Hall serve as a synagogue. The tombs of other biblical figures (Abner ben Ner, Otniel ben Kenaz, Ruth and Jesse) are also located in the city. The Oak of Sibta (Oak of Abraham) is an ancient tree which, in non-Jewish tradition, is said to mark the place where Abraham pitched his tent. The Russian Orthodox Church owns the site and the nearby Abraham's Oak Holy Trinity Monastery, consecrated in 1925. Hebron is one of the few cities to have preserved its Mamluk architecture. Many structures were built during the period, especially Sufi zawiyas. Mosques from the era include the Sheikh Ali al-Bakka and Al-Jawali mosque. The early Ottoman Abraham Avinu Synagogue in the city's historic Jewish quarter was built in 1540 and restored in 1738. Religious traditions Some Jewish traditions regarding Adam place him in Hebron after his expulsion from Eden. Another has Cain kill Abel there. A third has Adam and Eve buried in the cave of Machpelah. A Jewish-Christian tradition had it that Adam was formed from the red clay of the field of Damascus, near Hebron. A tradition arose in medieval Jewish texts that the Cave of the Patriarchs itself was the very entrance to the Garden of Eden. During the Middle Ages, pilgrims and the inhabitants of Hebron would eat the red earth as a charm against misfortune. Others report that the soil was harvested for export as a precious medicinal spice in Egypt, Arabia, Ethiopia and India and that the earth refilled after every digging. Legend also tells that Noah planted his vineyard on Mount Hebron. In medieval Christian tradition, Hebron was one of the three cities where Elizabeth was said to live, the legend implying that it might have been the birthplace of John the Baptist. One Islamic tradition has it that Muhammad alighted in Hebron during his night journey from Mecca to Jerusalem, and the mosque in the city is said to conserve one of his shoes. Another tradition states that Muhammad arranged for Hebron and its surrounding villages to become part of Tamim al-Dari's domain; this was implemented during Umar's reign as caliph. According to the arrangement, al-Dari and his descendants were only permitted to tax the residents for their land and the waqf of the Ibrahimi Mosque was entrusted to them. The simat al-Khalil or "Table