Burgruine Rehberg, Medieval castle ruins in Krems, Austria.

Burgruine Rehberg is a medieval castle that stands on a rocky spur overlooking the Krems River where two valleys meet. Stone foundations and wall fragments remain visible, showing the original layout of the defensive and residential structures.

The castle was first documented in 1141 as a stronghold of the Lengenbach family. When this family line ended in 1235, the Babenberg dynasty took control, increasing its importance in the region.

The castle church, recorded in 1316 as "chapelle ze Rechperch", stands on a lower terrace southeast of the main spur. Since 1783 it has been a filial church of Imbach, dedicated to St John, so the sacred building outlasted the fortress itself.

The ruin sits on a rocky spur above the Krems river, reached by a marked trail from Rehberg; the final stretch is steep and uneven. The church of St. John the Baptist stands on a lower terrace southeast of the main ruins. Wear sturdy shoes and allow time for the climb.

The castle church, first recorded in 1316 as "chapelle ze Rechperch", stands on a lower terrace southeast of the main spur. Since 1783 it has been a filial church of Imbach, dedicated to St John, and it remained in use long after the fortifications were abandoned.