The Congress Theatre is a Grade II* listed, purpose-built, modern theatre and conference venue in the seaside town of Eastbourne, East Sussex. It is one of the largest theatres in southern England, with seating capacity of 1,689. The theatre was designed in 1958 and built 1961–1963 by Bryan and Norman Westwood Architects. Ove Arup and Partners were engineers. The theatre underwent major refurbishment in 2019, to reveal a bright and contemporary look, whilst fully maintaining the character of the original design. Shows include touring West End theatre, ballet, opera, comedy and live music.