Baker Street is a street in the Marylebone district of the City of Westminster in London. It forms part of the A41. It is most famous for its connection to the fictional detective Sherlock Holmes, who lived at 221B Baker Street, an address that does not actually exist. The street is named for builder William Baker who laid the street out in the eighteenth century. It was originally a high class residential address, but now is mainly occupied by commercial premises. Baker street escorts are available for incall and outcall services.