Kleinštejn

Kleinštejn is a ruined medieval castle perched on a rocky spur of Humnický vrch in the Doupovské hory mountains, sealed inside the Hradiště Military Training Area – the largest army training ground in the Czech Republic. The ruins lie roughly 1.5–2 km southwest of the hamlet of Kotvina, near Klášterec nad Ohří in the Karlovy Vary Region. This is not a conventional tourist stop: it is a relic of settlement nearly six centuries old, locked today inside an active military zone.

Where exactly is Kleinštejn?

The castle site occupies a narrow, projecting spur on the slope of Humnický vrch – a classic position for a medieval rock castle, naturally defended on three sides. Its approximate coordinates are 50°21′ N, 13°9′ E. The surrounding Doupovské hory are a range of volcanic origin that has been almost entirely under military administration since the mid-20th century.

What is the castle's history?

The first written record of Kleinštejn dates to 1435, when it belonged to Žibřid ze Žďáru. Shortly afterward, the stronghold passed to Vojtěch z Doupova, which set off a dispute with Vend z Illburka, owner of the neighboring castle of Egerberk. The conflict ended abruptly: according to a surviving lawsuit record from 1437, a man named Jan, acting on Vend's instigation, captured and destroyed Kleinštejn. The castle was never rebuilt, and its documented existence effectively spans just those two years.

Interestingly, archaeological finds recovered from the ruins point to settlement traces dating back to the 13th–14th century – considerably earlier than the first written mention. This gap between the documentary record and the archaeological material remains one of the open questions about the site's origins; a smaller defensive structure may have stood there before the castle known from the 1435 record was built.

What did the castle look like?

Kleinštejn was a bergfried-type castle, built around a central round keep roughly 10 meters in diameter with walls nearly 3.7 meters thick. An L-shaped palace building with cellars adjoined the keep, and the whole complex was enclosed by a parkan – an outer defensive wall – together with ditches cut into the bedrock. The overall layout formed a shape close to a trapezoid, following the contour of the rocky spur on which the castle stood.

What remains of the castle today?

Nearly six centuries on, what is left consists mainly of uneven ground, fragments of foundations, and the outline of the moat – no standing walls or tower have survived. In summer the site is thickly overgrown with vegetation, which makes tracing the former layout even harder; spring or autumn, when the growth thins out, offer better conditions for spotting what remains of the stronghold.

Can you visit Kleinštejn?

The ruins sit inside the active Hradiště Military Training Area, a zone used by the army for exercises, so unrestricted access to the site is not possible. Entering the training ground requires permission from its military administration, and outside occasional public-access windows organized for Czech military areas, visiting the castle site independently is not an option. This sets Kleinštejn apart from most Czech castle ruins, which are normally open to visitors year-round.

Frequently asked questions

Where is Kleinštejn castle located? On a spur of Humnický vrch in the Doupovské hory mountains, about 1.5–2 km from the hamlet of Kotvina, inside the Hradiště Military Training Area in the Karlovy Vary Region.

When was the castle built? The first written mention dates to 1435, though archaeological finds suggest earlier settlement on the site, going back to the 13th–14th century.

Why did the castle cease to exist? It was captured and destroyed in 1437 during a dispute between Vojtěch z Doupova and Vend z Illburka, owner of the neighboring Egerberk castle.

Can Kleinštejn be visited today? There is no free access – the site lies within an active military training ground and requires permission from the military area administration.