Panna Castle, Castle ruin in Řepčice, Czech Republic.

Panna Castle is a vanished castle on the 596 m summit of the hill of the same name, about 0.5 km northwest of Řepčice. Only small earthwork relics of ramparts and other structures survive; most of the extensive castle was built of wood, with ramparts of local augitite columns set in clay holding wooden palisades.

Zikmund Děčínský z Vartenberka built Panna during the Hussite Wars as a base against Žižka's Kalich Castle, less than two kilometres away; it probably stood by autumn 1421. The Hussites failed in 1422 but took it in 1423 under Bohuslav ze Švamberka, and it stayed in their hands until 1437, when Zikmund of Vartenberk besieged it and the garrison surrendered after their captured commander ordered capitulation. It was then demolished.

The castle's name, Panna ("Maiden"), is documented only from the Hussite period; the sources record no maiden legend behind it. Its real story is the Hussite garrison under Hašek Čelechovec z Kralovic, who held the site from 1423 until its demolition in 1437.

The site lies on the 596 m summit of Panna hill, about 0.5 km northwest of Řepčice; the approach path came from the north in the Middle Ages. Only low earthworks of ramparts and other structures survive, so look for terrain shapes rather than walls. The core stood on the summit rock, reached by a steep path that may follow the medieval route.

Most of Panna's buildings were wooden, and its ramparts were built of horizontally laid local augitite columns bonded with clay, which also anchored the timber palisade. Fragments of stove tiles found on the summit rock show that some chambers were heated by tiled stoves.