Hammerhäuseln is a place, that after the Treaty of Saint-Germain belonged to Czechoslovakia and was situated in the administrative region Mariánské Lázně.
Hammerhäuseln was formerly part of the German Empire. In the German Empire, the place was called Hammerhäuseln. The place is now called Hamrníky (Mariánské Lázně-Hamrníky) and belongs to Czech Republic.