Fortress of Komárno
The fortress is the biggest historic monument in the city of Komárno and a national cultural monument. This unique fortified building is the most expansive system of fortifications in Central Europe, which is situated both in the Slovak Republic and in Hungary.
The oldest part was built in the 16th century on the site of a former mediaeval castle. It was restored, upgraded and expanded to the largest fortification system of the Austro-Hungarian Empire at the beginning of the 19th century.