Feuerstein Castle, Catholic castle in Ebermannstadt, Germany

Feuerstein Castle is a complex of rough grey stone blocks under red tiled roofs, built in 1941. A tall square stone tower rises at the junction of two wings: the left wing has three storeys with rows of rectangular windows and a gabled roof with dormer windows, while the lower right wing has two storeys, three arched ground-level openings, rectangular windows above and dormer windows on its roof. The tower has small rectangular openings spaced vertically.

The structure was built in 1941 by architect Oskar Vierling and initially functioned as a research facility for wireless communication technology. After World War Two, it was repurposed into a Catholic youth and retreat center.

The Church of the Transfiguration of Jesus was consecrated in 1961 and holds three spaces: a dimly lit crypt with the tabernacle and twelve candlesticks for the apostles, a lower church dedicated to Mary, Mother of Wisdom, with windows by Alfred Heller, and an upper church whose altar faces the congregation, anticipating the Second Vatican Council. Its glass wall is by Georg Meistermann.

The grounds are accessible on foot and information is available at the entrance areas, though the hillside location requires some walking. Suitable footwear is recommended for exploring both the exterior and the interior church spaces.

The castle's tower still serves as a microwave radio relay linking the Feuerstein Observatory, founded in 1999 about 500 metres south of the airfield, with Ebermannstadt in the valley. Oskar Vierling had built the tower to test the first radio relay link, so it fulfils its planned purpose today.