Qortin Redoubt (Maltese: Ridott tal-Qortin), also known as Eskalar Redoubt (Maltese: Ridott t'Eskalar), is a redoubt in the limits of Mellieħa, Malta. It was built by the Order of Saint John in 1715–1716 as one of a series of coastal fortifications around the Maltese Islands. Today, the redoubt still exists, but it has some modern modifications.