Frauenfeld is the capital of the canton of Thurgau in Switzerland. The earliest trace of human settlement are several La Tene era graves to the east of Langdorf. The Roman road from Oberwinterthur (Vitudurum) to Pfyn ran through what is now the Allmend in Frauenfeld. Two Roman villas were discovered in Thalbach and Oberkirch. The villa seems to have become the focal point of the later settlement of Oberkirch. On the ruins of the villa, an Early Middle Ages cemetery was built, and by the 9th Century, the Oberkirch church was built.