A D-type mural tower on the Western Outer Curtain Wall between the Constable's Gateway "stately home" (right) and Peverell's Tower (left). It fell down in the reign of King Edward VI, and was rebuilt by Queen Mary. Also called Port, Porth, Gostling, and Laswell's Tower. Listed Building, English Heritage site, and Scheduled Ancient Monument. Norman and Medieval History, Travel, Tourism, and Vacation.