Arbon is a historic and statistic town and a municipality and district capital of the district of Arbon in the canton of Thurgau in Switzerland.Arbon is located on the southern shore of Lake Constance and is situated on a railway line between Konstanz/Romanshorn and Rorschach/Chur, or St. Gallen, respectively.It has prehistoric sources reaching back to more than 6.5 thousands years. Parts of the castle on the peninsula was part of a Late Roman defensive fortification and developed into a medieval town in the first half of the thirteenth century.The official language of Arbon is (the Swiss variety of Standard) German, but the main spoken language is the local variant of the Alemannic Swiss German dialect.GeographyArbon is situated on a peninsula on the southwest shore of Lake Constance between Romanshorn and Rorschach. On the south, the municipality borders the canton of St. Gallen. St. Gallen is the nearest larger city.