This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "pub

Between the seventh and eleventh centuries, Christian worship on the Iberian Peninsula was structured by rituals of great theological and musical richness, know

Who composed in Charlemagne's name the impressive treatise that repudiates the Acts of the Second Council of Nicaea (but which, in the end, the king prevented f