What is the name of the street where the Sanctum Sanctorum is located?

The Sanctum Sanctorum is located on Bleecker Street in New York City's Greenwich Village. In Marvel Comics, its full fictional address is 177A Bleecker Street, where it serves as Doctor Strange's home, headquarters, and magical library.

The building first appeared in Strange Tales #110, published in July 1963. Although it looks like a townhouse from the outside, its interior is protected by enchantments and contains mystical artifacts, hidden rooms, and spaces that can seem much larger than the building's exterior suggests.

The Sanctum is one of three major magical sanctums established around the world, alongside locations in London and Hong Kong. Together, they help defend Earth from supernatural and interdimensional threats. The New York location is especially important because Doctor Strange uses it as both a residence and a base for the Masters of the Mystic Arts.

A common mix-up is the idea that 177A Bleecker Street was chosen as a reference to Sherlock Holmes's 221B Baker Street. The address actually references an apartment once shared by Marvel writers Roy Thomas and Gary Friedrich.