Pfäfers Abbey (German: Kloster Pfäfers), also known as St. Pirminsberg from its position on a mountain, was a Benedictine monastery in Pfäfers near Bad Ragaz, in the canton of St. Gallen, Switzerland.Situated at the junction of the Tamina and Rhine valleys, it flourished as a religious house and owner of lands and serfs, as well as assuming extraordinary importance as a political and cultural centre of the Chur–Raetian region.