The Schwerbelastungskörper (German: "heavy load-bearing body") (a.k.a. Großbelastungskörper - GBK) is a large concrete cylinder in Berlin, Germany. It was built by Dyckerhoff & Widmann AG in 1941 at a cost of 400,000 ℛℳ. It was built to study the feasibility of constructing a massive triumphal arch on the site, and of constructing large buildings on the area's sandy ground in general. It stands 18 m (59 ft) high and has a mass of 12,650 tonnes.