Downtown San Antonio is the central business district of San Antonio, Texas and the urban core of Greater San Antonio, a metropolitan area with nearly 2.5 million people. Downtown San Antonio is encircled by 1604 and I-410 loops and three interstate freeways: I-35, I-37, and I-10. Together, the three highways create a rectangular route around the city's urban core: I-35 to the north and west, I-37 to the east, and I-10 to the south. The rectangular loop has a nine-mile circumference and is known as the "Downtown Loop" or "Central Loop", which encompasses both it and Southtown. Districts Downtown is home to many districts including the Alamo District, Alamodome District, Arsenal, Central Business District, Convention Center District, Historic Civic District, Houston Street District, Lavaca District, La Villita District, Market Square District, North Downtown, River North District, Zona cultural, San Antonio CO-OP district, River Bend District, King William Historic District, South Flores Warehouse District, SoSo (South of Southtown), Southtown Arts District, Eastbourough, and the University District. The northwestern corner of Downtown is the Medical District. The Central Business District is home to the Rivercenter, anchored by a Macy's, an IMAX theater, an H&M, and formerly Dillard's. The five-level Art Deco Dillard's, at the corner of Alamo and Commerce streets, opened in 1887 as Joske's. Joske's flagship store was in floor space until Dillard's bought the Joske's chain in 1987. In August 2008, Dillard's moved out of the historic building as a part of a redevelopment plan for Rivercenter Mall. The Rivercenter Mall was built around St. Joseph Catholic Church after the church refused to move. Many people travel to visit the Alamo Plaza Historic District, which houses the famous Alamo. Attractions such as the river walk are home to many of the festivities throughout the year including NIOSA A Night in Old San Antonio which celebrates Fiesta, Cinco de Mayo, and numerous parades such as celebrations for their home NBA team the Spurs, Christmas parades and much more. In the southeastern part of Downtown is the Alamodome, a 65,000-seat arena that hosts many types of events, primarily conventions and football games. While many companies based in San Antonio are based in other parts of the city, particularly the Northwest Side and Uptown, there are companies based in Downtown San Antonio, such as H-E-B, Eye Care Centers of America, Bromley Originate Change, and Kell Muñoz Architects. Government and infrastructure The San Antonio