Indianapolis's downtown has undergone a transformation from a place of vacant storefronts and little activity to that of a dynamic urban district. In the 1970s, the city suffered from the problems that affected other Rust Belt cities, such as decreased economic activity, white flight, and racial tension. As a result, downtown Indianapolis was not a desirable place to be in the 1970s. The City of Indianapolis dealt with these issues and came up with solutions to revitalize the city's downtown. OneAmerica Tower Modern skyscrapers were constructed in the area during the 1980s, including the Chase Tower (built 1990). Revitalization of the Central Canal followed. This, along with plans for a new downtown mall, basketball arena, and new attractions such as museums, helped to revitalize Downtown Indianapolis. Thirty-six apartment buildings in downtown Indianapolis are listed on the National Register of Historic Places in the Apartments and Flats of Downtown Indianapolis Thematic Resources.[3]