Vlastimil Koubek (March 17, 1927 – February 15, 2003) was a Czech American architect who designed more than 100 buildings, most of them in the Washington, D.C., metropolitan area. When he died, he had designed buildings worth more than $2 billion. Most of his work is Modernist in style, although he developed a few structures in other vernaculars. He created the site plan for the redevelopment of Rosslyn, Virginia, and his Ames Center anchored the area's economic recovery. He also designed the World Building in Silver Spring, Maryland, which sparked redevelopment of that town's downtown and the L'Enfant Plaza Hotel in Washington, D.C., amongst many other buildings. In 1985, Washingtonian magazine considered him to be one of 20 people "who in the past 20 years had the greatest impact on the