Opfenbach is located in the Allgäu region, more precisely in the Westallgäu, about 15 km from Lindau.

Since the signing of the peace treaties of Brünn and Preßburg in 1805 the town belongs to Bavaria.

On the occasion of an alleged personal epiphany for Frau Antonie Rädler in a small chapel ("Gnadenkapelle"), the place of prayer developed bit by bit until the so-called "Sühnekirche", a bigger church in modern red steel architecture, was built.

In Wigratzbad Blessed Virgin Mary is venerated as "Unsere Liebe Frau vom Sieg" ("Our beloved woman of victory").

The remains of Antonie Rädler and long-time pilgrim pastor Pater Johannes Schmid OP, who is considered saintly by his followers, rest in a particular chapel-like grave.