The large Harbor (570 acres) and the northern entrance to the Suez Canal are protected by two long piers. The west pier, continuing the line of the harbor quay for some 2.5mi/4km, is designed to prevent the silting up of the channel by the deposit of mud carried down by the Nile. At its near end there formerly stood an imposing statue of Ferdinand de Lesseps (1805-94), constructor of the Suez Canal, but this was pulled down by Egyptian nationalists in 1956. To the south, on the harbor quay, is a 175ft/53m high lighthouse, with a light visible 23mi away. The east pier is almost 1mi/2km long.