Jenštejn Castle is a castle ruin in the village of Jenštejn (German: Jenstein, also Jenzenstein or Genzenstein) in the district of Prague-east in the Central Bohemian Region. The small town of Jenštejn was founded with a small, water-protected castle in the first half of the 14th century by (from here the name “jenc´s stone“ = "Jencenstein"), a high-ranking official in court yard, in 1336–1361. Lords of Jenštejn have their family name from the name of the castle. Since 1958 it has been protected as a cultural monument of the Czech Republic. The castle was opened to the public after the reconstruction in 1977. Today is the castle is under the wooden frame, but still open for people. In the castle it is possible to find an exhibition of the Regional Museum of Prague-East about life in the c