The Weiss Manfréd Acél- és Fémművek ("Manfréd Weiss Steel and Metal Works"), or colloquially Csepel Művek ("Csepel Works") was one of the largest machine factories in Hungary, located on Csepel island in the southern part of Budapest, founded in 1897. It was the second largest industrial enterprise in the Austro-Hungarian Monarchy, and the biggest industrial enterprise in the Hungarian half of the Empire. It played an integral role in the heavy industry and military production of the Austro-Hungarian Monarchy. Founded by , an industrialist of Jewish origin, by the time of World War I the company was one of largest defense contractors in Austria-Hungary, producing all types of equipment, from airplanes and munitions to automotive engines, bicycles and cars. Badly damaged by Allied air raid