The open field “Am Breitenacker” extends above today’s “Sauerwiese” street. In total, it is an arable area of approx. 200 x 200 meters, which was laid out in the settlement period after the Thirty Years’ War, not far from the first Schwanden homesteads. Open fields with about 100-meter-long parcels were the rule, as they were seen by the farmers as advantageous. The farmers and animals saved time and energy because they had to turn less often when cultivating the field. In the 200-meter-long fields of the „Breitenacker“ field, one worked even more economically. The following field in the direction of Spinnberg are all only half as wide, so that the first field rightly bears the name „Am Breitenacker“.