Numerous neolithic objects, including stone axes and neolithic grave mounds, indicate that the area was inhabited anciently. Additionally, Roman era coins have been discovered in the municipality. Very little is known about the village in the Middle Ages, except for several brief entries in historic records. In 1439 the Abbey of St. Gallen bought the low court rights in the village from Ulrich von St. Johann. The Abbey combined the village of Schönholzerswilen along with Heiligkreuz, Wuppenau and half of Toos to form a single court. Many of the surrounding farm houses remained part of the "Freigericht Thurlinden" (Free Court of Thurlinden) instead of being incorporated into the Abbey's court. The "Freigericht Thurlinden" remained independent of Schönholzerswilen until the creation of the Helvetic Republic in 1798.