medieval castle and tower silhouette icon set

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Four black silhouette icons of medieval castles and towers against a white background. Each icon features varying designs with pointed spires and multiple towers, evoking Gothic architecture. The top left portrays a simple structure with two towers. The top right illustrates a more complex castle with battlements and spires. The bottom left shows a castle with a cross atop one tower, suggesting a religious building. The bottom right has multiple high spires, resembling a fairy-tale castle. Each displays small window details.