The area at the confluence of the Danube and Morava rivers at the height 212 m above the sea level has been settled since prehistoric times. A massive Great Moravian stronghold was built here in the 9th century. In 1809, the castle was destroyed by the Napoleon´s army. In individual parts of the castle, the ground plans of an early Christian chapel from the 4th century and the foundations of the Great Moravian church from the 9th century are marked.