London has many professional theaters and four world-known symphony orchestras. Numerous art galleries and museums are found in the city, and the South Bank section of central London is the site of a large, modern cultural center. London also rich in traditional ceremonies. Every morning, the famous changing of-the-guard ceremony takes place in Buckingham Palace's courtyard. Trooping the Colour is a traditional part of the queen's official birthday celebration in June. The Lord Mayor's Show, on the second Saturday in November, celebrates the election of a new lord mayor of London.