The origin of the mausoleum is unknown, with some believing that it was originally the shrine of
Al-Hurr ibn Yusuf, but his name hidden and replaced with that of
Saint George over time in order to ensure the mausoleum would be kept protected for generations. The mausoleum is mentioned in the 12th-century writings of
Ibn Jubayr as being part of a larger mosque complex.
Yaqut al-Hamawi, writing from the 13th century, reports that Mosul was known as the city of the Saint George due to the existence of his purported tomb. After the Turco-Mongol conquerer
Tamerlane entered Mosul, he demolished the older mosque and reconstructed it as a larger structure in 1393 after seizing the city from the
Jalayirids. The
Timurids spared the city from complete destruction and instead focused on restoring older Islamic institutions for the benefit of the local Muslim community, which included maintenance of the mosque. An earthquake damaged the mosque in 1910, which resulted in it being rebuilt completely out of sandstone in order to strengthen the structure, while a new main dome for the mosque was erected over the old Timurid-era dome. After Dawlah had been expelled from
Mosul, the mosque was rebuilt into its original form and reopened for prayers in 2024, along with the nearby
Al-Nabi Shith Mosque. == Architecture ==