For 10 points, name this abbot who presided over the vast growth of the Cistercian order.
This man used titles like "In Praise of the Modesty of the Bride" and "Intimacies of the God of Love" for his sermons on the Song of Songs. King Louis VI commissioned this man to settle a schism caused by the election of both Innocent II and Anacletus II after the death of Pope Honorius II. He later assisted the Second Lateran Council in suppressing the remnants of the schism. A 1953 encyclical by Pius XII called this man the "last of the Fathers" and gave him the title Doctor Mellifluus. Peter Abelard arranged a debate with this man, which led to Abelard's condemnation at the Council of Sens. This man wrote an Apologia to Pope Eugene III after the tremendous failure of the Second Crusade, which he had supported at Vézelay. For 10 points, name this abbot who presided over the vast growth of the Cistercian order.
This man used titles like "In Praise of the Modesty of the Bride" and "Intimacies of the God of Love" for his sermons on the Song of Songs.
St. Bernard of Clairvaux [prompt on Bernard]