Afbeelding cover: Gian Lorenzo Bernini - Dove of the Holy Spirit (ca. 1660, stained glass, Throne of St. Peter, St. Peter's Basilica, Vatican) This photograph was taken by Dnalor_01 and released under the license(s) stated below. You are free to use it for any purpose as long as you credit the author, the Source (Wikimedia Commons) and the license (CC-BY-SA 3.0) close to the image.
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