2012,KM-313, Schön-304 Country Germany – Federal Republic (Germany) Year 2012 Value 100 Euro Metal Gold (.999) Weight 15.55 g Diameter 28 mm Commemorative issue UNESCO World Heritage – Aachen Obverse Lettering: BUNDESREPUBLIK DEUTSCHLAND 2012 100 EURO D Engraver: Erich Ott Erich Ott is a German sculptor, engraver, and designer. He is best known for his design of numerous German commemorative coins and designed the German Deutsche Mark coins in 1977, the 5 DM coin, commemorating the 200th anniversary of Carl Friedrich Gauss. Reverse Lettering: WELTERBE DOM ZU AACHEN OE UNESCO Engraver: Erich Ott Erich Ott is a German sculptor, engraver, and designer. He is best known for his design of numerous German commemorative coins and designed the German Deutsche Mark coins in 1977, the 5 DM coin, commemorating the 200th anniversary of Carl Friedrich Gauss.