In 1858, Prof. Konrad Hunäus drilled a well and discovered the first oil reservoir in Europe. Industrial crude oil exploration and production began to become a significant sector of the economy. Numerous oil exploration and production companies and service providers established in the area of Celle.
The oil pioneer Hermann von Rautenkranz founded the drilling company “Internationale Tiefbohrgesellschaft” in Hamburg in 1912. This company moved to Celle in 1913 and expanded in drilling activities, oil production and mechanical engineering.