How many structures remain in mecca that date back to the time of Muhammad ?
Other buildings that have been destroyed include the house of Khadijah , the wife of Muhammad , demolished to make way for public lavatories ; the house of Abu Bakr , Muhammad 's companion , now the site of the local Hilton hotel ; the house of Muhammad 's grandson Ali - Oraid and the Mosque of abu - Qubais , now the location of the King 's palace in Mecca ; Muhammad 's birthplace , demolished to make way for a library ; and the Ottoman - era Ajyad Fortress , demolished for construction of the Abraj Al Bait Towers .