The Biblia pauperum ("Paupers' Bible") was a tradition of picture Bibles beginning probably with Ansgar, and a common printed block-book in the later Middle Ages to visualize the typological correspondences between the Old and New Testaments. Unlike a simple "illustrated Bible", where the pictures are subordinated to the text, these Bibles placed the illustration in the centre, with only a brief text or sometimes no text at all.