Štúrovo, ruins of castles and forts

Celemantia was a Roman castellum and settlement on the territory of the present-day municipality Iža, 4 km to the east of Komárno. It is the biggest known Roman castellum in present-day Slovakia. It was a part of the Roman Limes, the frontier-zone of the Empire.

The château was built in the second half of the 13th century originally as the château of Tekov Borough. It was rebuilt several times. After 1542 if was changed into army anti-Turkish fortress. There is Tekov Museum in the château from 1958. Expositions: Exhibitions from collection of museum on certain topics and authors