Motte Luetjenburg, Medieval castle and open-air museum in Lütjenburg, Germany.

Motte Lütjenburg is a medieval fortified structure built on an artificial earth mound that once housed defensive buildings on its summit. The open-air museum displays reconstructed buildings and detailed explanations of how such strongholds functioned as administrative and military centers.

The Lütjenburg motte is a free reconstruction of a 12th–13th-century fortified seat from the Christianisation of Wagrien, built since 2003 in cooperation with the Archaeological State Office of Schleswig-Holstein. Its forms draw on excavations at the Kleiner and Großer Schlichtenberg, a motte on the Bayeux Tapestry and a tower in a Dürer watercolour. Over 40 such tower castles are documented in Plön district alone.

The site is run by a registered association whose members, in historical dress, operate the buildings with period tools, especially in summer. Medieval markets are held here, with emphasis on historically accurate presentation. The chapel, modelled on the chapel of Fuhlenhagen, can be used for weddings by arrangement.

The site is open year-round, but visits are restricted in the winter months. Guided tours are offered. The tower has a ground-level entrance, and a wooden bridge crosses the moat to the three-metre mound. Medieval markets and events take place at the site.

The reconstructed structures reveal details about daily routines and living conditions rather than just focusing on military strength alone. This hands-on approach helps visitors understand that these fortifications were working communities where ordinary life unfolded.