The polygonal gun platform around the keep has 16 sides, with a total of 14 gun embrasures. The two-storey forebuilding dates from the second half of the 16th century, with three rooms on each level linked by a spiral-staircase, and was originally used to house the captain of the castle. Its entrance was guarded with a portcullis, and the roof was designed to be defendable with handguns. The stone bridge that stretches across the ditch that protects the castle dates from 1902; it would originally have been protected at the front by a rectangular gatehouse, but this was demolished at the start of the 20th century.