The Qasr al-Bint sits upon a podium made of a rubble core retained by courses of ashlar masonry. The temple itself is also constructed of ashlar blocks. Access to the temple is provided by a monumental marble staircase of 27 steps, which is divided by a landing. The plan is square and consists of a pronaos (or vestibule), a naos (or chamber), and a tripartite adyton which contains the cella, the most sacred part of the temple.
The vestibule was originally framed by four columns with Corinthian capitals. None of these columns remain standing, and only fragments of the capitals have been found. There are additional chambers on either side of the cella. These two chambers originally had upper rooms that could be accessed by staircases concealed in the building’s thick walls. Both the interior and exterior walls were originally covered in decorative plaster work, some of which is still extant. Wooden-string courses line the lengths of the walls, and wooden wedges can still be found between some of the stones. The wood used in the structure has been identified as Lebanese Cedar.
