The Stardust took over the adjacent Royal Nevada hotel-casino in 1958, and joined it with the Stardust a year later. The casino, showroom, and restaurant at the Royal Nevada were converted into convention space and operated as the Stardust Auditorium. The Stardust heavily marketed its convention facilities. The Royal Nevada's hotel also became part of the Stardust, providing additional rooms. In November 1959, construction began on an additional hotel building. The $1 million structure would be three stories high and contain 160 rooms, with completion expected within five months. The nine-story hotel tower was added in 1964.