The Wilaya Building (Arabic: مقر ولاية الدار البيضاء الكبرى Hall of the Wilaya (Province) of Grand Casablanca, locally known as مقر الولاية Maqarr El-Wilaya or just El-Wilaya)[2] is the building that houses the administration of Grand Casablanca.

At the request of Hubert Lyautey, plans for an Hôtel de Ville were first drafted by Henri Prost in 1914, early on in the French Protectorate in Morocco, and then further developed in 1920.

[3] The building has three Mauro-Andalusi riad-style ṣuḥoon, or internal courtyards with fountains and plants, enveloped by riwaq (arcades) on the first and second floors.

[1] Following directives from the résidence général, or colonial administration, Boyer blended styles, with some elements of French Art Deco, particularly visible in the clock tower and the grand staircase, and elements of traditional Mauro-Andalusi architecture: courtyards, columns, arches, and tiles.

The grand staircase was decorated with two panels painted by Jacques Majorelle,[3] though they have since been relocated.The Wilaya Building is accessible from the Muhammad V Square Station on Line 1 of the Casablanca Tramway.