The chapel of St. Agatha on the Kristberg mountain is the oldest church still standing in the Montafon Valley. It was built in the early 1400s and owes its existence to mining. Legend has it that there had been a mining tunnel at the very spot, which caved in while men were working in it, and buried them alive. Lying under the rubble, the miners promised to build a church in honour of St. Agatha (patron saint of miners) if they were ever rescued. They were indeed rescued and kept their promise.
The building as it stands today is not as it was originally. Extensive work and enlargements were done in 1507, as shown by the inscription on one of the arches. Three small bells hang in the open belfry. One carries no date or inscription and is assumed to be from the 15th century. The second bell bears the date 1687. The third bell was replaced in 1965, as the old one cracked in 1914.