Greifenstein Castle, Medieval castle in Greifenstein, Germany.

Greifenstein Castle is a stone fortress perched at 441 meters above sea level on a hilltop with sweeping views over the Dill valley. The building combines medieval fortifications with Baroque additions, including a twin-towered keep with internal spiral staircase.

The castle received its first documented mention in 1160 when it served as a military stronghold. In 1676, Wilhelm Moritz of Solms-Greifenstein transformed it into a Baroque residence, marking a shift from its earlier defensive purpose.

The name Greifenstein refers to the gryphon (Greif) that turns as a weather vane on the pointed roof of the Bruderturm. Since 1984 the Roßmühle, a defensive tower, has housed the Glockenwelt bell museum, where almost 100 bells are shown and some can be rung by visitors. Since May 2005 the village registry office has run a wedding room called Münze in the castle.

The castle is a signed landmark from the A 45 motorway and stands on a hill at 441 metres above sea level. A circular walk leads through a gaol with torture implements, a weapons and wine cellar, living chambers and up a spiral staircase into the twin-towered bergfried. A restaurant is on site, and an educational herb garden and surrounding walking trails are part of the grounds.

The Brother Tower's three bells strike F-sharp, A and C, and its pointed roof carries a gryphon weather vane, a play on the castle's name. The castle was given to the Greifenstein Society for a symbolic one Deutsche Mark in 1969; the society received the German Prize for Monument Protection in 1985.