Architecturally, the Saarpolygon is unique and a masterpiece through and through: depending on which perspective you look at the polygon from, it takes on a different shape. An upside-down triangle, a sideways T, or a rectangular archway. Derived from the Greek term polygon for "polygon", it enables the viewer to recognize abstractly drawn motifs from mining. Past and future: mallets and iron, two winding towers, or the gate of the future and change.
In 2011, RAG is holding a Europe-wide ideas competition for a landmark that commemorates the end of mining. The Duhamel dump near the Saar mine in Ensdorf is chosen as the location. From a total of 147 competition designs, the design by the two Berlin architects Katja Pfeiffer and Oiliver Sachse was awarded first prize. The builder and future operator of the landmark is the newly founded support association BergBauErbeSaar e.V. The Saarpolygon was opened on September 16, 2016, financed by the support association as well as RAG AG, the RAG Foundation, the Saarland state government and individual donors.