Amsterdam
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Noord-Holland
The Netherlands
Constructed in: 1516
Typology: fort / fortification
Architect: H. de Keyser
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The Montelbaanstoren is a historic tower in Amsterdam, built in 1516 along the Oudeschans canal. Originally serving as a watchtower for the city's defense, it was later adorned in 1606 with a Renaissance-style decorative top designed by city architect Hendrick de Keyser, bringing its height to 48 meters. The tower's name derives from the Duke of Alba's unrealized plan to construct a castle named "Monte Albano" nearby, which evolved in local parlance to "Montelbaanstoren." Nicknamed "Malle Jaap" ("Crazy Jaap") due to its bells occasionally ringing unpredictably, the tower has been depicted by artists such as Rembrandt and Claude Monet. Over the years, it has housed various functions, including the city's water management office. After a restoration in 2006, it has been used by different organizations and currently serves as the office for Private Boat Tours since 2014.