Archaeological sites on the island include a
prehistoric cup-marked stone (currently in the island's museum), a
fulacht fiadh at Gort na Lobhar, a
Neolithic passage tomb at Cill Leire Forabhain, several
standing stones around the island, a
promontory fort at Dún an Óir, and a signal tower dating from the
Napoleonic Wars. The island also has a number of early Christian sites, and is reputed to be the birthplace of
Saint Ciarán of Saigir. The ruin of a 12th-century church, which has protected
national monument status, is close to the main pier in the North Harbour. The island had a population of over 1,052 before the
19th century famine, but the current population of Cape Clear is less than one-eighth of that figure. The island's primary school was built in 1897, and was visited by
President of Ireland Mary McAleese in 1998. Cape Clear was originally supplied with electricity produced by diesel generators on the island, but around 1995 these were replaced with a
submarine power cable from the mainland. ==Culture and language==