far based only on interpretations of Crusader sources. William of Tyre writes in his Historia that in 1161 Philip of Milly received the castle of Ahamant, which is seen to refer to Amman, as part of the lordship of Oultrejordain. In 1166 Philip joined the military order of the Knights Templar, passing on to them a significant part of his fief including the castle of Ahamant or "Haman", as it is named in the deed of confirmation issued by King Amalric. By 1170, Amman was in Ayyubid hands. The remains of a watch tower on Citadel Hill, first attributed to the Crusaders, now are preferentially dated to the Ayyubid period, leaving it to further research to find the location of the Crusader castle. During the Ayyubid period, the Damascene geographer al-Dimashqi wrote that Amman was part of the province of al-Karak, although "only ruins" remained of the town. During the Mamluk era (late 13th–early 16th centuries), the region of Amman was a part of Wilayat Balqa, the southernmost district of Mamlakat Dimashq (Damascus Province). The capital of the district in the first half of the 14th century was the minor administrative post of Hisban, which had a considerably smaller garrison than the other administrative centers in Transjordan, namely Ajlun and al-Karak. In 1321, the geographer Abu'l Fida, recorded that Amman was "a very ancient town" with fertile soil and surrounded by agricultural fields. For unclear, though likely financial reasons, in 1356, the capital of Balqa was transferred from Hisban to Amman, which was considered a madina (city). In 1357, Emir Sirghitmish bought Amman in its entirety, most likely to use revenues from the city to help fund the Madrasa of Sirghitmish, which he built in Cairo that same year. After his purchase of the city, Sirghitmish transferred the courts, administrative bureaucracy, markets and most of the inhabitants of Hisban to Amman. Moreover, he financed new building works in the city. Ownership of Amman following Sirghitmish's death in 1358 passed to successive generations of his descendants until 1395, when his descendants sold it to Emir Baydamur al-Khwarazmi, the na'ib as-saltana (viceroy) of Damascus. Afterward, part of Amman's cultivable lands were sold to Emir Sudun al-Shaykhuni (died 1396), the na'ib as-saltana of Egypt. The increasingly frequent division and sale of the city and lands of Amman to different owners signalled declining revenues coming from Amman, while at the same time, Hisban was