Qasr al-Banat, Girls castle or Palace of the Ladies (Arabic: قَصْر ٱلْبَنَات, romanized: Qaṣr al-Banāt), are a set of brick ruins of a residence dating from the 12th century in the city of Raqqa.

The Umayyad caliph Hisham ibn Abd al-Malik (r. 723–743) is said by medieval sources to have built two palaces nearby.

[2][additional citation(s) needed] By 1900, the ruins of Raqqa were repeatedly examined and documented by the likes of Ernst Herzfeld, who along with Friedrich Sarre conducted an archaeological survey of Mesopotamia between the Euphrates and the Tigris in 1907.

The well under Nur ad-Din in Damascus displays a similar form, which was widespread in Iran in mosques, palaces and sarays, in the center of their complexes.

When Friedrich Sarre and Ernst Herzfeld visited the site in 1907, followed by Gertrude Bell in 1910, they found this part of the building as a single upright on an otherwise flat ruin.