The bridge was originally protected by a mechanical interlocking, which was revised in 1914.

With one side defended by the river, the castle's other three sides were originally protected by a water-filled ditch.

The soft sandstone of the walls was originally protected by plaster internally and render externally.

Originally protected by the powerful Báthorys, they continued to have a precarious status in Transylvania.

The caponier has rifle firing ports and was originally protected from direct artillery fire by the glacis.

It is probable that many of the forts were also originally protected by earth bulwarks, although these have not survived.

The moat itself is excavated about 3-4 metres into the underlying limestone, and was originally protected by an outer wall.

Bell's daughter's anonymity was originally protected only until she reached the age of 18.

The walls were originally protected by 14 massive towers, but today only 12 remain.

The western gate was originally protected by two square towers that were probably built during the reign of Baibars.