The International Congress Center Berlin (ICC Berlin) in the Berlin district of Charlottenburg-Wilmersdorf was one of the largest congress centers in the world. The 313-meter long, 89-meter wide, and almost 40-meter-high building was built according to plans by the Berlin architects Ralf Student and Ursulina Student-Witte and opened on April 2, 1979, after four years of construction. A striking feature is the silver-gray aluminum facade of the building in the style of high-tech architecture.