A Benedictine priory was installed here by Louis VI and his queen, Adelaide, niece of Pope Calixtus II of the Capetian house of Burgundy. They began the present church as Romanesque, but soon the new system of vaulting was employed. Slowly but consecutively throughout the XII century St. Peter's church was built. Its oldest Gothic vault is the one over the section of the choir preceding the apse; the stout ribs have profiles like those which Abbot Suger was making about that same time in the forechurch of his abbatial.
The solemn dedication of St. Pierre-de-Montmartre took place in 1147 with Pope Eugene III officiating and St. Bernard and Peter the Venerable acting as deacon and subdeacon. Since the rebuilding of the apse, at the end of the XII century, numerous reconstructions have gone on in order to preserve the revered church.[90]
Je dis que droit est mort et loyauté éteinte Quand le bon roi est mort, la créature sainte, A qui se pourront désormais les pauvres gens clamer Quand le bon roy est mort qui tant les sut aimer? --REGRES DU ROY LOEYS.
The greatest glory of the Middle Ages was the saint-king himself. He was essentially of his epoch both in his love of theology and his enthusiasm for building. Under his grandfather, Philippe-Auguste, most of the Gothic cathedrals of France were begun. The majority of them continued building under Louis IX. In his reign Beauvais Cathedral was started, that of Meaux rebuilt, as was also St. Denis' cathedral-like abbatial. There rose now a host of lesser Gothic edifices, such as the Sainte-Chapelle at Paris, the synodal hall at Sens, and the hospital hall at Ourscamp. "And as a writer who has made his book, illuminating it with gold and azure, so our king illuminated his kingdom with the beautiful abbeys he built," wrote his friend Joinville.
All too many of his abbatials have been swept away--Royaumont,[92] built with the proceeds from his father's jewels, where Louis IX had worked side by side with the masons, where he had passed his saddest hours, for in its church was laid to rest his promising eldest son, whose beautiful tomb now is harbored at St. Denis. Gone, too, is Maubuisson Abbey, where was buried his mother, Blanche of Castile. Her bronze tomb was melted up and made into cannon during the Revolution, but one knows that the something high and Spanish in Blanche (whom her contemporaries compared to stag and eagle) would have preferred a cannon to the copper pennies into which were transmuted all too many of the ancient tombs. The mother of St. Louis was a woman cast in a heroic mold, daughter of that Spanish king who at Las Navas de Toloso saved Europe from an avalanche of 400,000 Mussulmans and granddaughter of art-loving Aliénor of Aquitaine and Henry II, Plantagenet.