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Photo: Acad Ronin, CC BY-SA 3.0 via Wikimedia Commons
In one of the old forts.
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.
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The museum and final resting place of John Amos Comenius, a Czech teacher, educator and writer, who spent the last 14 years of his life in Amsterdam. He is often considered the father of modern education.