Rufus Castle, also known as Bow and Arrow Castle, is a ruined castle overlooking Church Ope Cove on Portland, England. The castle dates from the late 15th century, on the site of an earlier building (with origins dating from 1142) - making it Portland's oldest castle. It is likely to have been named Rufus Castle as it was probably built by that king. Built directly off of the rock face, on a pinnacle of rock, the castle was positioned on the site of an earlier Saxon defence work.