While some scattered Neolithic items have been discovered in Ammerswil, the first known settlement was an Alamannic farmhouse. The village of Ammerswil is first mentioned in 924 as Onpretiswilare. In 1306 it was mentioned as Ombrechtzwile.[1] It was ruled successively by the Counts of Lenzburg, Kyburg and Habsburg, and then in 1415 by the city-state of Bern.