The interior of the Fort (best entered from the right) is now a bare enclosure with a few coast-guard huts. The isolated lump of building at the end is the remains of Kait Bey’s _Castle_, occupying the ground plan of the Pharos and utilising in part its foundations. Some of these foundations can be seen in the passage immediately to the right of the Castle. The orientation of the Castle and the Pharos was not exactly the same, since the Castle had to be adjusted to the points of the compass on account of the mosque that it contained.—The modern buildings to the right of the passage also rest on old foundations; it is thought that here stood the reservoir, filled with fresh water from the mainland and that on the other side (left of present Castle) stood another edifice with the mechanical statues to balance the design. But this is all conjecture. The _Mosque_ in the Castle is notable for two reasons: architecturally it is the oldest in the city, and in style it is essentially Cairene. It was built by the central government in the course of their coast defence scheme, and so does not resemble the ordinary mosque of the Delta. The entrance, with its five monoliths of Assouan granite, taken from the Pharos, is almost druidical in effect, but the arch above them and the flanking towers faintly recall the glories of Kait Bey’s work at Cairo. In the vestibule are remains of stucco on the ceiling and marble on the floor.—The actual Mosque is of the “school” type—a square with an arched recess opening out of each side, each recess being assigned to one of the four orthodox sects of Islam; the Mosque of Sultan Hassan at Cairo is a famous example of this type. The square, and the step leading up to each recess are inlaid with marble. Light enters through carved woodwork above.