The Royal Court Theatre, at different times known as the Court Theatre, the New Chelsea Theatre, and the Belgravia Theatre, is a non-commercial theatre in Sloane Square, London, England, opened in 1870; the current building was completed in 1888. The capacity of the theatre has varied between 728 seats and today's 380 seats (with a smaller upstairs theatre opened in 1969). In 1956 it was acquired by and remains the home of the English Stage Company, which focuses on contemporary theatre and won the Europe Prize Theatrical Realities in 1999.