A halo or circle of light around the head in religious art; a luminous circle or ring of color around something.
From Latin 'aureola' meaning 'golden' or 'small gold coin,' diminutive of 'aureus.' In medieval Christian art, it symbolized holiness or divine light.
Every saint in medieval paintings has an 'aureola'—it's basically a glowing resume that says 'I'm definitely holy' without needing words!
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