According to Westminster City Council, Bond Street has the highest density of haute couture stores anywhere in the world, attracting "the rich, the famous, and the simply curious". The entire length of Bond Street has been part of the Mayfair Conservation Area controlled by Westminster City Council since 1969. Building alterations and constructions are tightly controlled to ensure the street's appearance and upkeep are unaltered. Many buildings are listed. The council regulates the style and materials used on shop front advertising.