Třemšín, Castle ruin in Voltuš, Czech Republic

Třemšín is a castle ruin on elevated ground in Voltuš, with stone walls and foundations that reveal medieval construction techniques. The surviving wall sections show different building phases and suggest how the entire structure once functioned.

The first written mention of the castle dates to 1349, when it belonged to Beneš of Třemšína of the Buzic family. In 1403 King Wenceslas IV granted the estate to Jan Zajíc of Třemšína, and by 1410 robbers were reported gathering at the castle. Mikuláš Vepř held the title until 1446, but he resided at Rožmitál and the castle was abandoned; a 1528 permit to restore it was never carried out.

The name Třemšín comes from the střemcha, the bird cherry growing on the summit. A chapel of the Transfiguration of the Lord was built on the hilltop in 1771 by the Rožmitál head forester Jozef Eustach Kračmer, and around 1800 Archbishop Vilém Florentin Salm-Salm had the paths radically reworked.

Visitors reach the ruins via marked hiking trails that connect to a wider network of paths through the surrounding area. These trails are generally accessible but require sturdy footwear and care on uneven terrain.

The ruins contain architectural evidence of two distinct purposes: both military defensive structures and residential quarters from different periods. This reveals how the castle's function shifted over time.