Citadel in Grudziądz

The Citadel in Grudziądz is the main part of the Grudziądz Fortress, a Prussian fortification complex above the Vistula escarpment, about 1.5 km north of the centre. Construction began in 1776 on Frederick II’s orders and ended in 1789. The site remains military property, so it is not a museum with daily public access.

The fortress and the 1807 siege

The stronghold protected newly annexed lands and the crossing over the lower Vistula. During the Napoleonic Wars, French-Polish forces blockaded it from January 1807. Its defence, commanded by General Wilhelm de Courbiere, lasted until December despite the Peace of Tilsit being signed on 9 July. This resistance is its best-known historical story.

What survives

Surviving features include the donjon with ramparts and casemates, the Great Granary, the former commandancy, five bastions, four ravelins, counter-mining tunnels and a dry moat. In the nineteenth century it was a political prison for more than 200 November Uprising soldiers; Fritz Reuter was imprisoned above the Lower Gate in 1838–1839.

Visiting and practical information

The interiors are not open daily. In 2026, “Citadel Discoverer” runs Saturdays 9 May–26 September: meet by 10:50 at the main gate, Czwartaków 3; entry is 11:00, the tour lasts about 2.5 hours, and tickets cost PLN 25/20. A Polish ID is required; under-16s need an adult. Other dates require RAWELIN booking and military approval; foreign visitors apply seven working days ahead. Check current rules.