Arbon is a historic 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, on a railway line between Konstanz/Romanshorn and Rorschach/Chur, or St. Gallen, respectively. It is the site of prehistoric settlements reaching back 6500 years. Elements of the castle on the peninsula were part of a Late Roman defensive fortification that developed into a medieval town in the first half o... Wikipedia