For centuries, the complex, located in the center of Baghdad, is a science center with its library and literary works. As it was the science center in its era while nowadays referred with Abdul Qadir Gilani Complex, it hosts a number of literary works.

Built in 1165, the mausoleum was extended with subsequent repairs. Suleiman the Magnificent, after the Iraqi Expedition (1534), rebuilt the mosque to Mimar Sinan. Suleiman the Magnificent had Mimar Sinan rebuild the complex after the Iraq Campaign (1534). It was extensively renovated by Murad IV in 1638. It was also repaired by Ahmed II, Abdülaziz and Abdul Hamid II in 1708, 1865 and 1903 respectively.

Bibliography:

http://www.selcuklumirasi.com/architecture-detail/abdulkadir-geylani-mausoleum