Today's selection is the wonderful "Requiem pour Voix d'Hommes" of one Pierre Bouteiller, a Baroque Frenchman most famous for this very work (and for very little else). After listening to it, though, I'm really not sure why we're not more familiar with him. (Also, playlist).
Attribution(s): "Glockenspiel Bells" by cocoparisienne (via the Visualhunt site).