The Zumurrud Khatun Mosque and Mausoleum (), also known as the Tomb of Sitta Zubayda, is a historic mosque and shrine located in Baghdad, Iraq. It dates back to the Abbasid era. It is located in Sheikh Maarouf Cemetery in the Karkh side of Baghdad, and the site was built at the patronage of Zumurrud Khatun and her son. Zumurrud Khatun was mother of the 34th Abbasid Caliph Al-Nasir, and wife of the 33rd Abbasid Caliph Al-Mustadi. She collected the waqf money from madrasas and built her mausoleum before her death, which is located in Karkh. The building is covered by the distinct nine layered muqarnas dome capped by a small cupola. The minaret of the mosque is considered built during the time of Seljuq dynasty in 12th century, and it is considered the oldest surviving minaret in Baghdad. The building has robust construction made of bricks and plaster. There is also an attached library, and an adjoined Shafi'i madrasa. Due to the mosque being dominated by Hanafi maddhab, the extension to the north for Shafi'i maddhab was added, which is called Shafi'i Mosque. The mosque is one of two historic mausoleums in Karkh. The other is the Sheikh Maruf Mosque. History By most accounts, Zumurrud Khatun is identified as a formerly-enslaved Turkish woman who became a prominent noblewoman during the Abbasid Caliphate. She rose to this position through multiple marriages, but most notable is her marriage to the Caliph Al-Mustadi. Zumurrud Khatun is also remembered as the mother of Abbasid Caliph Al-Nasir. She is described as being a religious woman and an active patroness of architecture and public works. Her legacy as patroness was due to her restoration of public infrastructure and for building educational and funerary buildings. The Mosque and Mausoleum of Zumurrud Khatun were created at the commission of Al-Nasir and his mother before her death in 1202. After her death, she was laid to rest in the mausoleum following a funeral procession. Zamurrud Khatun was also actively involved in the construction of a madrasa. Furthermore, she was also remembered by many as an active member in politics and Islamic religious policies, a generous person devoted to Islamic teachings and law, and various other aspects. For instance, she is in history for spending 300,000 dirhams to repair water supplies and cisterns during the pilgrimage. Architecture The Building’s Plan and Space The building features a nine-layered conically-shaped muqarnas