The Brompton Oratory is a large neo-classical Roman Catholic church in Knightsbridge, London. Its full name is the Church of the Immaculate Heart of Mary, or as named in its Grade II* architectural listing, The Oratory. The church is closely connected with The London Oratory School, a boys' school founded by the priests from the London Oratory. Its priests celebrate Mass daily in the two main forms, frequently conduct ceremonies for well-known people, as it works as an extra-parochial church, and two of its three choirs have published physical copy and digital audio albums.