The Ed Sullivan Theater is a theater at 1697–1699 Broadway, between 53rd and 54th streets, in the Theater District of Midtown Manhattan in New York City, New York, U.S. Built from 1926 to 1927 as a Broadway theater, the Sullivan was developed by Arthur Hammerstein in memory of his father, Oscar Hammerstein I. The two-level theater was designed by Herbert J. Krapp with over 1,500 seats, though the modern Ed Sullivan Theater was downsized to 370 seats by 2015. The neo-Gothic interior is a New York City designated landmark, and the building is on the National Register of Historic Places.