It displays the number "221B" above its door, although its actual street number is 239 (there's no real 221B). This four-story home, built in 1815, has been the Sherlock Holmes Museum since 1990.

when the Abbey National vacated their building and the Royal Mail finally agreed to deliver all letters addressed to 221B Baker Street to the museum at 239 Baker Street. The Sherlock Holmes Museum ...

The building was originally ... to the various depictions of Sherlock Holmes on screen. To be properly immersed in some of the most popular novels in history. The museum’s lovingly recreated ...

The Sherlock Holmes Museum is an odd beast ... A chipper constable greets us on the door and ushers us into the gift shop to purchase a ticket. This is a magnificent space, richly decorated ...