Muhammad's wives
Muhammad was monogamous for 25 years. After his first wife Khadija bint Khuwaylid died, he proceeded to marry the wives listed below, and most of them were widows. Muhammad's life is traditionally delineated as two epochs: pre-hijra (emigration) in Mecca, a city in western Arabia, from the year 570 to 622, and post-hijra in Medina, from 622 until his death in 632. All but two of his marriages were contracted after the Hijra (migration to Medina). Of Muhammad's thirteen wives, at least two, Rayhana bint Zayd and Maria al-Qibtiyya, were referred to simply as concubines; however, there is debate among Muslims as to whether these two officially became his wives. Of his thirteen wives, only two bore him children, a fact which has been described as "curious" by Cornell University Professor of Near Eastern Studies David S. Powers.
Mecca
It has been reported that there are now fewer than 20 structures remaining 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.