Complex sentence: He also brought the relics of Saint Vitus and Saint Cucuphas to Saint-Denis, where the relics of Cucuphas occupy a place of honor in the apse to the right of those of Saint Denis to this day.
Split into simpler sentences: He also brought the relics of Saint Vitus and Saint Cucuphas to St. Denis. The relics of Cucuphas occupy a place of honor in the apse to the right of St. Denis to this day.