De Contemptu Mundi (On Contempt for the World) is the most well-known work of Bernard of Cluny. It is a 3,000 verse poem of stinging satire directed against the secular and religious failings he observed in the world around him. He spares no one; priests, nuns, bishops, monks, and even Rome itself are mercilessly scourged for their shortcomings. For this reason it was first printed by Matthias Flacius in Varia poemata de corrupto ecclesiae statu (Basle, 1557) as one of his testes veritatis, or witnesses of the deep-seated corruption of medieval society and of the Church, and was often reprinted by Protestants in the course of the seventeenth and eighteenth centuries.