Thalwil is a municipality and town in the district of Horgen in the canton of Zürich in Switzerland. In addition to the town of Thalwil, the municipality includes the village of Gattikon. History Thalwil is first mentioned around 1030 as Talwile villam, which is derived from Tellewilare, Tello's Farm, and indicates the early medieval origins of Thalwil as an Alemannic farmstead. Only a few graves remain from this period. In 1133, it was mentioned as Telwil. The parish of Thalwil originally comprised four Wachten (hamlets): Ludretikon, the oldest hamlet (mentioned in 915), bordering Rüschlikon Oberdorf (Upper Village), the area around the church Unterdorf (Lower Village), the area roughly south of the railway station Langnau, which separated from Thalwil around 1713 In medieval times, the economy consisted mainly of farms, vineyards as well as a small amount of fishing, crafts and shipping (on the lake). This estate was once owned by the Dukes of Habsburg and held by the Barons of Eschenbach. The Abbeys of Muri and Wettingen also had significant interests and owned 12 and 3 farms respectively. Thalwil also boasts the oldest wood corporation in the Canton of Zurich, the Bannegg-Waldung. It was first mentioned in 1483, when Muri Abbey granted it to the twelve beneficiaries of the Abbey farms in Thalwil. Today the corporation is owned by 16 members as well as by the Thalwil Gemeinde. Geography The municipality of Thalwil is located on the Zimmerberg ridge between the western shore of Lake Zurich and the Sihl river. It includes the town of Thalwil, on the eastern slopes of the ridge alongside the lake, and the village of Gattikon, on the westen slopes and the bank of the Sihl. Thalwil borders on the communes of Rüschlikon, Langnau am Albis, Oberrieden, Horgen and (across the lake) Erlenbach. The municipality has an area of . Of this area, 18% is used for agricultural purposes, while 23.8% is forested. Of the rest of the land, 56.1% is settled (buildings or roads) and the remainder (2.2%) is non-productive (rivers, glaciers or mountains). housing and buildings made up 42.3% of the total area, while transportation infrastructure made up the rest (13.7%). Of the total unproductive area, water (streams and lakes) made up 1.4% of the area. 51.3% of the total municipal area was undergoing some type of construction. Coat of arms The Gemeindewappen (communal flag or coat of arms) consists of two diagonally