The Spanjaardenkasteel ("Spaniards' Castle") was a castle in the city of Ghent in present-day Belgium.

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The castle was commissioned in 1540 by the Holy Roman Emperor and Spanish king Charles V after he crushed a rebellion by the city.^[1] The castle housed a garrison of about 2,500 men. The castle was eventually demolished in the 19th century.^{[citation needed]}