The Zollverein Coal Mine Industrial Complex in Essen represents the development of traditional heavy industries in Europe, and the innovative architecture that was used.Mining here started in the middle of the 19th century in the village of Katernberg. Because of its closeness to the major railway to Cologne, the site had the potential to grow. And it did grow indeed. This culminated in the construction of shaft no. 12 in 1930, with its outer landmarks often named the Eiffel Tower of the Ruh