Zimmerwald (German pronunciation: [ˈtsɪmɐˌvalt]) was an independent municipality in the Canton of Bern, Switzerland until 31 December 2003.

Between 800 and 900, Ciberni entering Southern Germany first settled on the Längenberg (Long Mountain), the hill on which Zimmerwald lies.

The international workers' movement split as a result of the conference into a social democratic and a revolutionary wing.

They include rare pieces such as bull horns, old Germanic lures, serpents and flap trumpets, but also Swiss alphorns.

[citation needed] The Zimmerwald Observatory is the reference point for the CH1903+ Swiss coordinate system.