Hochtief (Hochtief;: HOT) is Germany's largest building construction company and the world's second largest international contractor, founded in 1875, headquartered in Essen, Germany, its business worldwide, with five legal subsidiaries, which, in addition to Hochtief Airport (Hochtief AirPort), are involved in the construction of the world's largest airport. Hochtief's representative projects include the relocation of the Abu Simbel temple, the new Athens International Airport, the first nuclear power station in Germany, etc., including the customs union coal mine and the reconstruction of the Kandinsky-Klee house in Dessau, Saxony-Anhalt. Kandinsky-Klee house in Dessau, Saxony-Anhalt, two works were confirmed as World Cultural Heritage.