Blackrock Castle

Blackrock Castle stands in Blackrock, Cork, Ireland, and it was constructed by the citizens of Cork under the authority of the English crown in the late 16th century.

In 1582 a fortification was erected on the site after the town’s inhabitants petitioned Queen Elizabeth I for protection of the upper harbour and port. Around 1600 a circular tower was added to the structure to guard against pirate attacks. The property passed into the ownership of the municipal corporation following a charter granted by King James I in 1608, and the castle appears in the Council Book of Cork for 1613 and 1614.

Across the 18th century and later, Cork Corporation used the castle for public banquets and social gatherings. The city maintained a triennial August custom in which the Mayor cast a roughly four-foot dart from a boat to assert the Corporation’s jurisdiction over the harbour.

A significant blaze destroyed the earlier four-storey tower in 1722; the townspeople financed reconstruction at a recorded cost of £296. Another major fire consumed the castle in 1827. Rebuilding under the direction of Mayor Thomas Dunscombe took place from 1828 until March 1829, when architects George Richard Pain and James Pain raised the original tower by three additional storeys and reconstructed the ancillary buildings, producing a neo-Gothic ensemble.

During the 20th century the property moved into private hands and served at various times as a private house, office space, the headquarters of a rowing club, and a dining establishment. Cork Corporation reacquired the castle in 2001. A partnership between the city council, Cork Institute of Technology and a private benefactor led to redevelopment in the early 2000s, and the Cosmos at the Castle project opened in 2007. After that work, the site incorporated an observatory and an interactive astronomy centre with exhibits described as a tour of the universe and a radio telescope, and it included laboratories used by astronomical researchers from Cork Institute of Technology.