Bregenzer Festspiele (German pronunciation: [ˌbreːɡɛntsɐ ˈfɛst.ʃpiːlə]; Bregenz Festival) is a performing arts festival which is held every July and August in Bregenz in Vorarlberg (Austria). It features a large floating stage which is situated on Lake Constance.Bregenzer Festspiele is a performing arts festival held every July and August in Bregenz in Vorarlberg. It features a large floating stage situated on Lake Constance.