Qasr al-Bint, Nabataean temple in Petra, Jordan.

Qasr al-Bint is a freestanding Nabataean temple in Petra, built of ashlar blocks on a rubble-core podium. A monumental marble staircase of 27 steps, divided by a landing, leads up to a square plan of pronaos, naos and tripartite adyton. The vestibule was framed by four Corinthian columns, of which only fragments remain, and the walls still show traces of decorative plasterwork.

The building was constructed around 30 BCE and served as the main sanctuary of ancient Petra. It survived centuries of earthquakes and decay to remain one of the few standing major structures from this vanished city.

The name Qasr al-Bint Fir'aun, "palace of Pharaoh's daughter", comes from a local folktale: a princess set her suitors the task of bringing water to her palace, and chose the more modest one who credited God. The deity worshipped here is debated — Dushara, Zeus Hypsistos or Al-Uzza — and a baetyl fragment was found in the cella.

The temple is reached by following the wide colonnaded street that runs through central Petra. The site has little shade, so bring water and plan to rest during the hottest part of the day.

The wood in the walls has been identified as Lebanese cedar, and wooden wedges still sit between some of the ashlar blocks. Radiocarbon dating of this wood in 2014 placed the temple's earliest possible construction at the start of the first century CE. Some scholars credit these wooden string courses with keeping the building at full height.