Blue Plaque: 221b Sherlock Holmes consulting detective

When Arthur Conan Doyle first introduced the world to Sherlock Holmes in eighteen eighty-seven, the address two hundred twenty-one B Baker Street was a pure invention. At that time, the numbering on Baker Street did not even reach two hundred, meaning the detective lived in a space that quite literally did not exist. It remained a fictional location for decades, existing only in the imaginations of readers who sent thousands of letters to the character at an address they assumed must be real.