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Dar Hassan Pacha is an 18th-century palace located in the Casbah of Algiers, Algeria. It was built in 1791 and used to belong to Hassan III Pasha, who signed a treaty with the US September 5, 1795. After 1830, it became the winter residence of the Governor of Algiers, and as a consequence, it was completely remodelled in 1839, when the entrance has been changed and a new facade was created.
Hassan Pacha was the ruler of Algiers and a man with a sense of purpose – in 1795 he concluded a peace treaty with the fledgling USA guaranteeing their ships safe passage in Algiers’ waters. Before that, around 1791, he began work building his palace on the edge of the Casbah, but away from the waterside, which was vulnerable and damp in winter. When Algiers fell to the French the house was turned into the governor’s winter residence. Its facade was remodelled, and unlike most large houses here the Dar Hassan Pacha was given a European-style front, with rows of large windows and balconies and a grander entrance.