The Netherlands Fortress Museum

The Dutch Fortress Museum is located in the city of Naarden, the Netherlands. The museum was established by volunteers in 1955 at bastion Turfpoort, one of six bastions that give the walled city its distinctive star shape. The fortifications themselves, including the bastions, date from the period 1575–1585, when King Philip II of Spain ordered them to be constructed.

The museum includes exhibits on the history of fortification, garrison life, the Dutch Water Line, and the history of the city of Naarden-Vesting. The exhibits are housed in rooms in four casemates; because the casemates consist of a thick layer of earth, temperatures in the rooms are relatively stable, being warm in winter and cool in summer. Above ground, the museum also contains a collection of guns from the 19th century.