Overall, the Dallas–Fort Worth metro area had the second largest population increase among metro areas in the U.S., which recorded a population of 7,233,323 as of July 1, 2016, an increase of 807,000 people since the 2010 census.It became an industrial city, attracting workers from Texas, the South, and the Midwest.The Praetorian Building of 15 stories, built in 1909, was the first skyscraper west of the Mississippi and the tallest building in Texas for some time. A racetrack for Thoroughbreds was built and their owners established the Dallas Jockey Club.Although some of Dallas' architecture dates from the late 19th and early 20th centuries, most of the notable architecture in the city is from the modernist and postmodernist eras. Several smaller structures are fashioned in the Gothic Revival style, such as the Kirby Building, and the neoclassical style, as seen in the Davis and Wilson Buildings.Iconic examples of modernist architecture include Reunion Tower, the JFK Memorial, I. One architectural "hotbed" in the city is a stretch of historic houses along Swiss Avenue, which contains all shades and variants of architecture from Victorian to neoclassical.
Today, most of the area's northern residents are Hispanic.Dallas and nearby Fort Worth were developed due to the construction of major railroad lines through the area allowing access to cotton, cattle, and later oil in North and East Texas.The construction of the Interstate Highway System reinforced Dallas' prominence as a transportation hub with four major interstate highways converging in the city, and a fifth interstate loop around it.Trotters raced at a track in Fort Worth, where a similar Drivers Club was based.The rapid expansion of population increased competition for jobs and housing.