The former Holy Trinity Church is a closed Anglican church in the centre of Brighton, part of the English city of Brighton and Hove. Established in the early 19th century by Thomas Read Kemp, an important figure in Brighton's early political and religious life, it was originally an independent Nonconformist chapel but became an Anglican chapel of ease when Kemp returned to the Church of England. The church closed in 1984, but was converted into a museum and later an art gallery. Reflecting its architectural and historical importance, it has been listed at Grade II since 1981.