The Gaylord National Resort & Convention Center is a hotel and convention center located at National Harbor, Prince George's County, in the U.S. state of Maryland. The hotel is situated along the shores of the Potomac, downriver from Washington, D.C., and across the river from Alexandria, Virginia. It is owned by Gaylord Hotels, a division of Ryman Hospitality Properties, and operated by Marriott International. The hotel opened April 1, 2008, as part of a new mixed-use development in National Harbor. It is one of the largest non-gaming hotel and convention centers on the East Coast of the United States. It cost $870 million to build.