Diadem

Ornamental headband worn by monarchs and others as a badge of royalty

Ornamental headband worn by monarchs and others as a badge of royalty

Photo: Mary Harrsch · Commons · CC BY-SA 4.0 · Cropped & Resized

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A diadem is a crown, specifically an ornamental headband worn by monarchs and others as a badge of royalty.

Image: Mary Harrsch, CC BY-SA 4.0 · Text from Wikipedia, CC BY-SA 4.0