On July 4, 1976, following the rendezvous of Tall Ships in New York for the U.S. Bicentennial, eight ships from other nations visited Baltimore, where they attracted a huge number of tourists. This interest helped spur the development of other tourist attractions – including the National Aquarium, Maryland Science Center, and the Harborplace festival marketplace (operated by The Rouse Company), which opened on July 4, 1980. The nearby Baltimore Convention Center and Hyatt Regency Baltimore Hotel added to the services and resulted in population density and visitors.