Citadel of Dinant, Military fortress museum on a cliff in Dinant, Belgium.

The Citadel of Dinant stands on a steep rock 100 metres above the Meuse, its long grey stone facade pierced by a row of small rectangular openings. A lower wall follows the rock contour, and a broad dark stone stairway descends diagonally from a gap in the ramparts. A flag flies from a short tower at the left end of the flat roofline.

Dutch military engineers constructed the present structure between 1818 and 1821 atop foundations of earlier fortifications dating to the 11th century. German forces destroyed portions during the 1914 invasion and occupied the complex again from 1940 to 1944.

The citadel has housed a historical and weapons museum since the end of the Second World War. A miniature version of the citadel, the collegiate church and the town centre is displayed at Mini-Europe in Brussels. The site also commemorates the fierce fighting of August 1914 between German and French soldiers.

Visitors reach the complex by climbing 408 steps or boarding a cable car from downtown. Guided tours through underground tunnels and exhibition rooms last approximately 90 minutes. A café with an observation terrace overlooking the river valley operates on site.

A collapsed air raid shelter from World War I remains preserved showing the exact condition after German artillery struck, including buried equipment and structural damage that has remained unchanged for over a century.