Sevnica Castle, Medieval castle in Sevnica Municipality, Slovenia

Sevnica Castle is a medieval castle on a hill above the old town of Sevnica. Its present late-Renaissance appearance dates from rebuilding by Innocenz Moscon between 1595 and 1597. The oldest surviving element is part of a tower, with walls 2.6 metres thick, incorporated into the east residential wing.

The fortress was founded in the 12th century as a defensive stronghold to protect the region. In the 16th century, it was transformed into a residential complex with more comfortable spaces.

The name Lichtenwald, recorded in 1309, means "light wood". The Lutheran Cellar on the southeast slope of Castle Hill looks like a plain farm building but was built as a hidden Lutheran chapel; its interior frescoes from the second half of the 16th century are among the best preserved paintings of that period in Slovenia. Manor administrator Oswald Geriacher, buried in the parish church in 1575, was probably a Protestant and likely had it built.

The location is easily accessible on foot during the day via a built pathway. Visitors should wear sturdy shoes, as steep stairs and uneven surfaces are present inside.

The Lutheran Cellar, a plain farm building on the southeast slope of Castle Hill, was built in the mid-16th century as a hidden Lutheran chapel. Its interior holds frescoes from the second half of the 16th century, among the finest surviving paintings of that period in Slovenia. Manor administrator Oswald Geriacher, buried in 1575, was likely a Protestant and probably had it built.