CityCenter (also known as CityCenter Las Vegas) is a 16,797,000-square-foot (1,560,500 m) mixed-use, urban complex on 76 acres (31 ha) located on the Las Vegas Strip in Paradise, Nevada. The project was started by MGM Resorts International; Dubai World became a joint partner during the project's construction phase. It is the largest privately funded construction project in the history of the United States. The project is connected by a people mover system to adjacent MGM properties Monte Carlo Las Vegas and Bellagio Las Vegas. As of 2015, the "CityCenter" branding has been largely retired, with the focus instead on the Aria brand of the development's centerpiece property in names such as the "Aria Express" (formerly "CityCenter Tram") and "Aria Art Collection" (formerly "CityCenter Art Collection").