The Millennium Hilton New York One UN Plaza is a 439-room hotel in the East Midtown neighborhood of Manhattan in New York City, United States. Designed by architect Kevin Roche of the firm Roche-Dinkeloo and opened in 1976, the hotel is located at 44th Street and First Avenue, near the headquarters of the United Nations. It occupies the top 13 stories of One and Two United Nations Plaza, a pair of 39-story skyscrapers also designed by Roche-Dinkeloo. The UN Plaza Hotel is owned by Millennium & Copthorne Hotels and operated by Hilton Hotels & Resorts. Part of the hotel's interior is a New York City designated landmark.