The Everett McKinley Dirksen United States Courthouse, commonly referred to as the Dirksen Federal Building, is a skyscraper in downtown Chicago, Illinois. It was designed by Ludwig Mies van der Rohe and completed in 1964. The building is 384 feet (117 m) tall, with 30 floors. It was named for U.S. Congressman and Senator Everett Dirksen. 