Bibles moralisées (moralized Bibles) are a small group of lavishly illustrated books that were popular in 13th-century France and Spain. Bibles moralisées do not contain the full text of the Bible; rather, they present selected passages accompanied by illustrations and texts explaining their moral and allegorical meanings. They are among the most expensive illuminated manuscripts ever made because they contain an unusually large number of illustrations and only one side of each folio is used. Web resource here.
Top: Blanche of Castile and King Louis IX of France; bottom: Priest dictating to a scribe. Moralized Bible of Saint Louis. 1227-1234. The Morgan Library and Museum, MS M.240, fol. 8.