Nur al-Din Bimaristan is a large Muslim medieval bimaristan ("hospital") in Damascus, Syria. It is located in the al-Hariqa quarter in the old walled city, to the southwest of the Umayyad Mosque. It was built and named after the Zengid Sultan Nur ad-Din in 1154, and later on an extension was added to the main building in 1242 by a physician Badr al-Din. It was restored in 1975 and now houses the Museum of Medicine and Science in the Arab World. Constructed in two phases the first construction phase was commissioned by Nur al-Din in 1154 CE and the second phase was about 90 years later and was commissioned by a physician, Badr al-Din, circa 1242 CE. It was renovated in 1975 and a small museum was established here.