Biberstein is a municipality in the district of Aarau of the canton of Aargau in Switzerland. Geography Biberstein is located on the north bank of the Aar River near Aarau. The town is a 17-minute bus ride from downtown Aarau. The neighboring communities are Auenstein to the east, Küttigen to the west, Rohr to the south, Rupperswil to the south-east and Thalheim to the north-east. The community of Biberstein occupies of which is wooded. Biberstein has an area, , of . Of this area, 34.8% is used for agricultural purposes, while 50.6% is forested. Of the rest of the land, 10% is settled (buildings or roads) and the remainder (4.6%) is non-productive (rivers or lakes). History Based on archaeologic evidence, the Biberstein area has been inhabited since at least the 6th century. The discoveries have included a grave cut into the surrounding tuff stone, Alamanni graves and a Spatha that was found. In 2005, the community celebrated the 725 years of Biberstein. In the 13th century the Count of Habsburg-Laufenburg built a castle, Schloss Biberstein, and the surrounding village to limit the territorial expansion of the Counts of Kyburg. The castle's position on the banks of the Aar River allowed them to collect tolls on the Aar ship traffic. Near the castle there was also a ferry that operated between Biberstein and Rohr until the beginning of the Second World War when it was replaced with a bridge. The village is first mentioned in 1280. Then, the village and castle were mentioned as a city in 1315 as a holding of the Habsburg-Laufenburg family. In 1335 the Knights Hospitaller order in Klingnau became the owners of Biberstein. By 1399 the city had a wall around it. In 1499, during the Swabian War the city was besieged by Bern. In 1527 the city-state of Bern took the castle and appointed a vogt or bailiff to occupy it. A few years later, in 1535, the Knights were forced to sell the city to Bern. This is the last time that Biberstein is mentioned as a city. Following the Napoleonic invasion and collapse of the Swiss Ancien Régime in 1798 Biberstein became part of the District of Aarau in the new Canton Aargau. Coat of arms The blazon of the municipal coat of arms is Gules a Beaver Argent sitting on a mount of the same gnawing a piece of wood Or. This