Hafnerberg, Lower Austria, village in the district of Baden, alt. 478 m, lies above the Triestingtal valley at the foot of the Festenberg mountain (593 m), part of the market town Altenmarkt an der Triesting. - Parish and pilgrimage church, Baroque central-plan building (1729-1745) in prominent location, splendid high altar by B. F. Moll (1744), frescoes by J. I. Mildorfer (1743/48), Rococo organ (1767) by A. Pfliegler. Church ruins from the 13th century. Has been a monastery (Brotherhood of the Sacred Heart of Jesus) since 1987.