Mashhad al-Dikka, built in 962 by Seif al-Dawla, is the earliest known Shi'i shrine in Aleppo. It is located on the slope of Jabal Jawshan, a hill on the western side of the city. Mashhad al-Dikka went through many expansions and construction phases spanning almost three decades. This slow process of building gives the mashhad a layered texture that actually maps the different phases and influences. The oldest part of the building is the double-domed mausoleum, which was built during the reign of al-Zengi. The water facilities located in the projecting mass at the northeastern corner was built by Nur al-Din in 1146. The main entrance, in the form of a large stone muqarnas portal, dates to 1189. The mashhad complex contains a sanctuary with three domes and a mihrab. The northern portico contains three domed bays devoid of detail and decoration.