The 12 Hours of Raphael Click on any image to open that page. Hours of the Day Hours of the Night For one of the many interpretations of the symbolic meanings of the nymphs and the elements in both the main compositions and the predellas below them, see Sarah Hutchins Killikelly, Curious Questions in History, Literature, Art, and Social Life, Designed as a Manual of General Information, Vol. II, 1895, pg 11 and ff. Note that Killikelly has reversed the Fourth and Fifth Hours of the Night.