The Ed Sullivan Theater, 1697-1699 Broadway between West 53rd and West 54th.
The 1200-seat theater — of which 461 seats are used for TV audiences — has been used as a venue for live and taped CBS broadcasts since 1936.
It is best known as the longtime home of The Ed Sullivan Show and the site of the first U.S. Beatles performance. Since 1993, it has been the home of the Late Show with David Letterman and is on the list of National Register of Historic Places. The interior has been designated a landmark by the New York City Landmarks Preservation Commission.