It was completed in 1905 on the site of a former fish market - hence the name. It has never served a defensive purpose, although it is an excellent lookout place. The cityscape opening up from there, including the Fishermen's Bastion, has been part of UNESCO's World Heritage since 1988. The crypt of the ancient St. Michael Cemetery Chapel (the first written record dates from 1443) was opened to the public in 1997.