Powerscourt House and Estate is Co. Wicklow. The place-name comes from the Anglo-Norman Le Poer family, anglicised as Power, who originally had a castle at this site. Later it was a stronghold of the O'Toole clan until the early 17th century. After the O'Tooles were drawn into a rebellion it was granted by James I in 1603 to Sir Richard Wingfield. His descendants held it until 1961, when it was acquired by the Slazenger family. Powerscourt House is a modification of a 13th century castle made by German architect Richard Cassells in the years 1731-41.
The film Barry Lyndon, directed by Stanley Kubrick and released in 1975, was filmed at Powerscourt House and Gardens. Some of the interior scenes are an interesting record of the architecture as a fire destroyed much of the house a few months later.
"The committee have named eight new streets off the West side of Ormeau Road: Mornington Street, Zetland Street, Gosford Street, Gosford Place, Powerscourt Street, Belmore Street, Bagot Street, and Essex Street". From the minutes of the Town Improvement Committee, reported in the Belfast Weekly News on Saturday 05 September 1874. The name Powerscourt Street is no longer in use, there is however Powerscourt Place in the same vicinity.