Rüti Abbey
Aadorf is first mentioned in 886 as "Ahadorf". The oldest record of Tänikon, now part of Ettenhausen, dates to 789 as "Tanninchova". Tänikon is also the site of the Tänikon monastery, founded in the 13th century. Aawangen is first mentioned in 844 as "Oninwanc". Ettenhausen is first mentioned in 1278 as "Oetenhuse". Guntershausen bei Aadorf is first mentioned in 1282 as "Gundolthuser tal". On 6 April 1358 the brothers Herman and Beringer "von Landenberg" and Hermann von Landenberg donated the church of Aadorf to the Rüti Abbey.