Metropolitan Life North Building

The Metropolitan Life North Building, now known as Eleven Madison and colloquially known as The UBS Building or The CS Building is 30-story Art Deco skyscraper adjacent to Madison Square Park at 11–25 Madison Avenue in the Flatiron District neighborhood of Manhattan in New York City. The building is bordered by East 24th Street, Madison Avenue, East 25th Street and Park Avenue South, and was formerly connected by a sky bridge and tunnel to the Metropolitan Life Insurance Company Tower just south of it.

The North Building was built in three stages on the site of the second Madison Square Presbyterian Church. Construction started in 1929, just before the onset of the Great Depression. Originally planned to be 100 stories, the North Building was never completed as originally planned due to funding problems following the Depression. The current design was constructed in three stages through 1950. As part of the Metropolitan Life Home Office Complex, the North Building was added to the National Register of Historic Places on January 19, 1996.

It serves as the North American headquarters for UBS Investment Bank who is by far the largest tenant. Additionally, a handful of floors previously occupied by UBS predecessor Credit Suisse now houses the headquarters of Sony Corporation of America and its select subsidiaries, including its entertainment unit as well as Sony Music and Sony Music Publishing.