Al-Musta'sim Billah Mosque
The Al-Musta'sim Billah Mosque, formerly the Abu Rabi'ah Mosque, also known as Mashhad al-Wu'udbefore it became a mosqueis a Sunni mosque and shrine, located in the al-A'dhamiyya district of the city of Baghdad, in the Baghdad Governorate of Iraq. The structure was renovated in modern times, and it contains the tomb of the last Abbasid Caliph, al-Musta'sim.
History
The site was the location of a shrine known as Mashhad al-Wu'ud, built over the grave of Ahmad al-Sabti, who was the son of the Abbasid Caliph Harun al-Rashid and a Sufi mystic. The Abbasid Caliph, al-Musta'sim was killed by Hulegu Khan's forces in the Siege of Baghdad in 1258, and his remains were reburied at this site. His daughter Rabi'ah was buried at the site later on, and a shrine was built for her, hence the name of the mosque was the Abu Rabi'ah Mosque.Before discovering the Caliph's tomb, it was believed that al-Musta'sim was buried in the Mausoleum of Umar Suhrawardi. Following archaeological excavation at the mosque in 1993, Imad Abd al-Salam Ra'uf, an historian who was involved in the excavations, found the tombstone of the deceased Caliph. The mosque and the attached tomb were renovated in 2005. It was almost completely rebuilt in a modern Iraqi style. A room for the Imam and other necessities were added to the mosque's structure.