But _revenons à nostro matière_, as dear Joinville, seneschal of Champagne, would say. The reason for the wealth of architecture and its allied arts and crafts in the region of which Troyes is the center was because the ancient city, so unnoted in to-day's activities, lay on the mediæval highway of commerce, and under its enterprising rulers became the scene bi-yearly of a fair to which all Europe flocked. To this day we use Troy weight. The counts of Champagne safeguarded the visiting merchants and fostered commerce by wise laws. Their money passed in Rome and Venice as freely as in Provins and Troyes. Lavish and art-loving were the Champagne rulers; one of them founded Clairvaux in lower Champagne; another rebuilt the Cistercian church of Pontigny, just over the border in Burgundy. They were indefatigable crusaders, some of them winning thrones in the East. And their alliances constantly enriched their stock with new qualities, as when Count Henry the Magnificent wedded, in 1164, the daughter of Louis VII by Aliénor of Aquitaine. That Countess Marie--the _suer comtessa_ to whom her half brother, Richard Coeur-de-Lion, addressed his famous prison song--made of her court of Champagne a school of good manners with all the ceremonial of the Midi's _cour d'amour_. What M. Gaston Paris calls poet-laureates' work, _poésie courtoise_, became the vogue, and the Countess Marie herself wrote in the troubadour manner. She encouraged the best of the XII-century poets, Crestien de Troyes (d. 1175), suggesting to him the romances of the Breton cycle, Lancelot, Tristan, and Percival.[152] Through Crestien the story of the Holy Grail spread over Europe. In him the trouvères new ideals of chivalry met the Midi's refined gallantry, and the Celtic themes which he versified brought what was needed of passion and profundity. All Europe then drew its poetic inspirations from the _matière de France_, as France in her turn was enriching herself from the inexhaustible _matière de Bretagne_. The XII-century French trouvères were imitated by the German Minnesingers, by the early songsters of England, Spain, and Portugal, and in Italy the precursors of Dante preferred the use of the Romance tongues of France. In the fecund hour wherein our modern civilization was conceived, France gave to the Western World her architecture, her sculpture, and her poetry. At the cathedral doors of Verona, Roland and Oliver were sculpted.