Ecclesiastically, Arbon belonged to the territory of the Bishop of Constance. In 1255, Bishop Eberhard von Waldburg gave Arbon a dispensation for market rights in the area and built the city wall. That century saw an influx of inhabitants from the surrounding farms. From 1262 to 1264, and again in 1266, the young Duke of Swabia, Conradin of Hohenstaufen, resided in Arbon because the Bishop of Constance was his guardian. The surrounding towns of Steinach, Mörschwil, Horn, Goldach, Egnach, Roggwil, and Steinebrunn all belonged to the parish of Arbon.