On 17th May 1754, a sales contract for the building of a new blast furnace was signed between Johan Baptist van den Bergh and some local entrepreneurs in Ulft , the Netherlands. This project heralded the start of a company that is still going strong to this day. The company is called De Koninklijke Diepenbrock en Reigers of Ulft or, in short, DRU. DRU started out as a blast furnace, producing numerous products from cast iron. DRU pots and pans are still well known today. When natural gas was discovered in the Netherlands at the beginning of the 1960s, DRU switched to producing gas fires and wall heaters. DRU is now one of the oldest industrial companies in the Netherlands.