Robert Campin [Public domain], <a href="https://commons.wikimedia.org/wiki/File:Mass_of_Saint_Gregory_(1440)_by_Robert_Campin.jpg"  target="_blank">via Wikimedia Commons</a>

The Mass of St Gregory, by Robert Campin, 15th century

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Robert Campin [Public domain], via Wikimedia Commons

Added to Paus Gregorius I and categorized in 4 years ago

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