medievalstyle occult artwork depicting skeletons and monsters within an ancient icon or old book

medieval occult art skeletons monsters gothic dark mysterious esoteric religion spirituality mythical creatures demonic figures archaic icons ancient imagery book illustrations old books manuscripts intricate details chiaroscuro frescoes mural alchemy magic witchcraft necromancy paganism altar scenes cryptic symbols holy relics celestial bodies heaven hell grimoire mystical rituals ages esotericism enigmatic occultism mystic religious symbolism