As any #CallOfCthulhu veteran knows, old books you've inherited bring nothing but trouble. You should keep them under lock and key - or perhaps even burn them, just to be safe.
An angel unlocking the Door of Hell. Hell is represented as a great mouth within which are human beings and devils. Winchester Psalter [Psalter of Henry of Blois; Psalter of St. Swithun]. Winchester [Priory of St. Swithun, or Hyde Abbey]; between 1121 and 1161. #art#medieval#devil#religion#books