Lapikus, Medieval castle ruins in Plaveč, Czech Republic.

Lapikus is a castle ruin on a wooded rocky spur above a bend of the Plenkovický potok, two kilometres northwest of Plaveč. Remains include the foundations of the perimeter wall, the ruined masonry of a tower and a building on the north side, and rubble from the tower and palace.

Lapikus was probably built at the end of the 14th century; in 1381 it was mentioned as the seat of Boček of Plaveč. The first written record under the name Lapikus dates from 1411, when Gebl and Štěpán of Hrušovany sued Jan Veitmilnar of Žerotice over its unlawful possession. It was destroyed during the Bohemian-Hungarian wars in the second half of the 15th century and was listed as deserted in 1508.

The ruins reflect medieval defensive architecture of the region and stand today as a protected cultural monument. Visitors can trace this military building tradition in the surviving walls and tower structures.

The ruins are accessible via marked hiking trails from Plaveč village, with the southern tower being the most easily reached. Visitors should wear sturdy shoes since the path crosses uneven terrain.

A 1:50 scale model of the original castle, built in 2025 by Jaroslav Jelínek, is displayed on a private front garden on Štursova Street in Kroměříž, far from the ruin itself. The castle was probably founded at the end of the 14th century as the seat of Boček of Plaveč.