The Lighthouse > History
The Hook Lighthouse is a unique example of an almost intact medieval lighthouse. Built in the early thirteenth century it continues to serve its original function. It is believed to be one of the oldest operational lighthouses in the world.
Hook Lighthouse is one of the most fascinating examples of medieval architecture in Ireland. The tower stands four storeys high with walls up to 4 metres thick. The tower was constructed of local limestone and the original building survives almost intact. Standing 36 metres high, the tower consists of two tiers linked by as mural (within the wall) stairway of 115 steps. The first tier is 13m in diameter at the base and has three storeys, each consisting of a rib-vaulted chamber with original thirteenth century fireplace. In the thickness of the wall there are a number of small mural chambers, including two garderobes (toilets). The upper tier is 6m in diameter: originally it supported the fire beacon, which in later times was replaced by a lantern.