An undecorated postern gate also was constructed through the north wall. There is a small postern gate at L. Opposite the rotunda entrance was a postern, a small secondary gate for pedestrians. A postern is a secondary door or gate. A square turret with machicolations is located above the postern gate in the west wall. Near Wakefield Tower was a postern gate which allowed private access to the king's apartments. Another postern gate may have been set into the collapsed south wall. It has a small postern gate towards the open sea for escape. They let a Roman contingent in through a postern gate. Until 1415 this was a small postern leading onto marshy Moorfields. "Postigo" means "postern" or a small gate in Spanish. It was pierced with thirteen gateways, exclusive of a small postern wicket. This originally ran up to the castle walls, with a postern on Tower Street. Probably around the 1250s a postern was added to the north wall. Beyond the Ouse, the walls resume at Skeldergate, where there was once another postern.