Daugavpils fortress is an outstanding fortification that occupies more than 150 ha. The only early 19th century fortress in Eastern Europe that has remained virtually unchanged.   

A zigzag line of fortifications is formed by a rampart with 8 bastions, 6 ravelins, 6 counterguards and other protective structures: lunettes, redoubts and a moat. On the left bank of the Daugava River there is a bridgehead. Each detail of the fortress was developed using the construction experience of the best architectural schools of Tsarist Russia and Europe. Inside the fortress was planned as a traditional military town: in the centre there was a parade ground, surrounded by blocks of administrative and residential buildings.