Gonsenheim is a borough in the northwest corner of Mainz, Germany. With about 20,000 inhabitants, Gonsenheim is the biggest borough of Mainz and behind Ober- and Neustadt the third biggest part of the capital town.The history of Gonsenheim reaches back to the Neolithic Era, the Chalcolithic Europe (2800 to 2400 B.C.). Importance as human settlement became Gonsenheim by the foundation of a Merovingian settlement in the 6th century. This foundation grew quickly due to the favorable location regarding agriculture. In 1938 Gonsenheim was suburbanised and therefore a part of Mainz.Nowadays, Gonsenheim is partly still formed rustic, despite the nearly 70 years affiliation to Mainz. Besides the old village core around St. Stephans church and the Renaissance town hall, there are the workers quarters and mansions established in the middle of the 19th century, the tower buildings, with about 6.000 people living there, the commercial zone „Am Hemel“ and lots of nature like the small, but geo-ecologically and botanical supra-regional important nature preserve Mainz Sand Dunes „Großer Sand“ as well as parts of the Lennebergwald, the biggest connested forest in Rheinhessen.