The Zähringerstadt is a historic section in the Old City of Bern in Bern, Switzerland. The first expansion of Bern occurred as the city was founded in 1191. This central and oldest neighbourhood was known as the Zähringerstadt (Zähringer town) after the founder, Duke Berthold V of Zähringen. Most likely the first city started at Nydegg Castle on the Aare river and reached west on the narrow peninsula to the Zytglogge (Swiss German: clock tower). The city was divided by three longitudinal streets, which stretched from the Castle to the city wall. Both the position of the town church and the shape of the eaves were typical for a Zähringer city.