A fortress on the east bank of Medemblik’s harbour, Radboud Castle was commissioned by Floris V, Count of Holland, and completed before the catastrophic St. Lucia’s Flood of 1287. For three centuries it served as both stronghold and refuge for the town’s inhabitants.
At a glance
Radboud Castle stands as one of North Holland’s significant medieval fortifications. Completed in the 13th century, it later saw action during the Dutch Revolt and witnessed raids by pirates and armies alike. The castle’s defensive role diminished after Medemblik itself was fortified with city walls in 1572.
History
Floris V, Count of Holland, commissioned the castle’s construction in the late 13th century. Though the precise building date remains unknown, it was finished before the devastating St. Lucia’s Flood of 13 December 1287—a catastrophe that tested the fortification’s worth immediately.
In June 1517, the castle proved its value once more when it provided refuge for Medemblik residents during raids by Grutte Pier and his Arumer Zwarte Hoop, a notorious band of pirate marauders. Decades later, during the Dutch Revolt, the castle surrendered on 12 August 1588 to Diederik Sonoy and the Geuzen, the Sea Beggars who fought against Spanish rule.
The fortification’s strategic importance waned after 1572, when walls were built around Medemblik itself. Subsequent neglect and deliberate dismantling gradually eroded the castle’s structures and defensive capability.
What you see
The castle occupies the east bank of Medemblik’s harbour, positioned to command the waterfront approach. Centuries of attrition from both dismantling and lack of maintenance have altered its original form, yet the surviving stonework speaks to its medieval construction and the practical fortifications of the age.
Cultural significance
Radboud Castle represents an important chapter in the military architecture and political history of North Holland. It exemplifies the feudal power of the House of Holland and the defensive needs of a strategic trading town. The castle’s history—from noble commission through pirate attacks to its role in the Dutch Revolt—mirrors the turbulent centuries of the Low Countries.
Key facts
- Location: East bank of Medemblik harbour, Netherlands
- Commissioned by: Floris V, Count of Holland
- Completed: Before 13 December 1287
- Coordinates: 52.77°N, 5.11°E
- Surrendered: 12 August 1588 to Diederik Sonoy and the Geuzen
Practical information & getting there
Medemblik is a historic harbour town in North Holland, accessible by road and rail from Amsterdam. The castle’s waterside location makes it part of the town’s medieval fabric. Visit the municipality of Medemblik’s heritage resources for current information on visiting hours and access.
Sources & resources
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