 This company with its premises was situated on an area called "Stephanikirchenweide" at the periphery of the ancient town of Bremen.It was an iron-foundry and machine factory with a wide-ranging production volume of iron-made parts as bridges, cranes, floodgates, steam boiler, steam engines etc.In 1846 Mr. Leonhard left the company and the company's name was changed to C. Waltjen & Co.