Why was Jerusalem holy to the Muslims during the crusades?

Jerusalem was considered holy to Muslims during the Crusades primarily because it is home to the Al-Aqsa Mosque, which is the third holiest site in Islam after Mecca and Medina. The city is believed to be the location from which the Prophet Muhammad ascended to heaven during the Night Journey, making it a significant spiritual center. Additionally, Jerusalem holds historical and religious importance in Islamic tradition, further solidifying its status as a revered city for Muslims during the Crusades.