Mariastein Abbey (Kloster Mariastein) is a Benedictine monastery in Metzerlen-Mariastein in the Canton of Solothurn, Switzerland. Mariastein, after Einsiedeln, is the second most important place of pilgrimage in Switzerland. Over the Chapel of Grace (`Gnadenkapelle`) now stands a late Gothic three-aisled basilica. The interior is Baroque and the.....