Rüsselsheim am Main is the largest city in the Groß-Gerau district in the Rhein-Main region of Germany. It is one of seven special status cities (implementing several functions that counties normally provide) in Hessen and is located on the Main, between Frankfurt and Mainz, only a few kilometres from its mouth in Mainz. The suburbs of Bauschheim and Königstädten are included in Rüsselsheim. Rüsselsheim has attained international recognition through the presence of the German car company Opel. Rüsselsheim's foundation goes back to a Frankish colony in the first half of the 5th century. The first written mention of "Rucilesheim", or "the house of Rucile", is in an inventory of royal hunting rights around the year 840. Rüsselsheim emerged from a settlement of the Count of Katzenelnbogen. Over time, the name of the city evolved from Rucilesheim to the current Rüsselsheim: 764/5 Rucile(n)sheim before 1130 Ruozcelenesheim 1336 Ruzelnsheim 1275 Ruozelsheim 1640 Ruselsem 1840 Rüsselsheim In the year 1435 the high noble Count John IV of Katzenelnbogen was the first to cultivate Riesling in Rüsselsheim. Annual reports record that his administrator bought new vines for 22 Schilling. In the following years riesling grapes were planted down the river Rhine and up the river Mosel. In the 18th and 19th centuries, Rüsselsheim made a new contribution to the history of wine when famous wine-growing estates in the Rheingau recultivated their vineyards with vines from the Rüsselsheim and Flörsheim Area (Allendorf, Rheingauer Weinbauverband EV 1980). After the First World War viticulture disappeared in Rüsselsheim. In 1980 the mayor of Rüsselsheim Dr. Karl-Heinz Storsberg set up a museum-vineyard near the castle which celebrates 550 Years of Riesling. The town's population reached 1,422 by 1829, then doubled between 1875 and 1914 from 3,500 to 8,000. At the beginning of the Second World War, 16,000 people lived in Rüsselsheim; only 9,500 remained at the conflict's end.