The history of a construction company is always also the history of general economics. It is inseparably linked to the development of trade and industry, of economy and company. Manfred Pohl and Birgit Siekmann have successfully presented this in the history of HOCHTIEF. HOCHTIEF is now not only the largest construction company in Germany, but also the oldest. Its beginnings date back to the 70's of the 19th century, when the brothers Helfmann opened a building business in Frankfurt am Main. The invention of reinforced concrete also triggered the successful development of HOCHTIEF. After the Second World War, during the course of the economic miracle, HOCHTIEF made its international breakthrough. As an economic leader, the company implements today, starting from its core competence construction, complex projects of all dimensions on all continents.