Handel was the first occupant of 25 Brook Street, which he rented from 1723 until his death there in 1759. Almost all his works after 1723, amongst them many of his best-known operas, oratorios and ceremonial music, were composed and partially rehearsed in the house, which contained a variety of keyboard instruments, including harpsichords, a clavichord and a small chamber organ.The museum was opened in 2001 by the Handel House Trust as the result of an initiative of the musicologist and Handelian Stanley Sadie in 1959. It comprises a carefully restored set of period rooms on the first and second floors of 25 Brook Street together with exhibition rooms in number 23, the adjacent house on the terrace.The museumThe original idea for establishing a museum at 25 Brook Street to commemorate its original and most notable occupant first occurred to the musicologist Stanley Sadie in 1959, at a party held there by the fashion company Viyella to commemorate the bicentenary of Handel's death. After a further 30 years, in the early 1990s Sadie and his wife Julie Anne set up the Handel House Trust, the charity which oversaw the conversion of the house into a museum.The house has been restored to look as it did during Handel's 36 year occupancy from 1723 to 1759. A typical early 18th century London terrace house, it comprises a basement, three main storeys and an attic, and Handel was the first occupant. The attic was later converted into a fourth full floor. The ground floor is a shop not associated with the Museum, and the upper floors are leased to a charity called the Handel House Trust, and have been open to the public since 8 November 2001.