Fortifications

Modlin Fortress

Where the Vistula meets the Narew and the Wkra, some 30 km north-west of Warsaw, lies one of the largest and best-preserved fortresses in Poland. Construction was ordered by Napoleon himself on 1 December 1806, and the first design came from General François de Chasseloup-Laubat. In the citadel alone, the barracks stretch for 2,250 metres — the longest building in Europe.

A fortress of four armies

The defensive ring grew for over a century and blends French, Russian and Polish military architecture: the core was raised between 1807 and 1812, with 10,000–12,000 local peasants at work in 1812 alone. The fortress was besieged four times — in 1813, 1831, 1915 and 1939 — and saw Polish–Bolshevik fighting in 1920. It never fell to a direct assault: in 1813 the siege that began on 5 February dragged on for weeks, with the garrison tying down substantial Russian forces in Napoleon's rear.

A sense of scale

Around the citadel spread fortified bridgeheads and two rings of forts built from the 1880s until the outbreak of the First World War. By the Vistula stands the Granary (Spichlerz), a giant 256 m long. Casemates, bastions and earthen ramparts form a landscape where distances between the fortress works are measured in hundreds of metres.

Visiting

The best way to see Modlin is a guided walk through the underground corridors and casemates — check the routes and times before you come. The trip from Warsaw takes about half an hour, so the fortress fits comfortably into a half-day outing. Bring a warm layer and a torch for the casemates: it stays cool down there even in summer.