Holland House is now a fragmentary ruin, having been devastated by incendiary bombing during the Second World War in 1940, but the ruins and the grounds were bought by London County Council in 1952 from the last private owner, the 6th Earl of Ilchester. Today the remains of the house form a backdrop for the open air Holland Park Theatre, which is the home of Opera Holland Park. To the immediate south of the park is the former site of the Commonwealth Institute, now home to the Design Museum.