Salah Bey ben Mostefa (; 1725–1792), was the bey of the Beylik of Constantine in the Deylik of Algiers from 1771 to 1792. Salah Bey's governance is marked by a victorious participation against the Invasion of Algiers (1775) during the Spanish–Algerian War (1775–1785) and his works of urban planning in Constantine. An example of remaining construction from his era is Bab El Kantra Bridge.
See also Salah Bey Viaduct, a cable-stayed bridge that spans the gorge valley of the Rhummel in Constantine, Algeria Salah Bey Mosque, a mosque in Annaba, Algeria Salah Bey (town), a town and commune in Algeria
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