Thus the north side of the choir shows a series of windows that precisely cover the lifetime of Saint Louis (1215-70). The south side begins, next the apse, with windows numbers 35 and 36, which belong, according to the Comte d'Armancourt, to the family of Montfort, whose ruined castle crowns the hill of Montfort l'Amaury, on the road to Paris, some forty kilometres northeast of Chartres. Every one is supposed to know the story of Simon de Montfort who was killed before Toulouse in 1218. Simon left two sons, Amaury and Simon. The sculptor Bridan put an end also to the window of Amaury, but in the rose, Amaury, according to the Abbes, still rides on a white horse. Amaury's history is well known. He was made Constable of France by Queen Blanche in 1231; went on crusade in 1239; was captured by the infidels, taken to Babylon, ransomed, and in returning to France, died at Otranto in 1241. For that age Amaury was but a commonplace person, totally overshadowed by his brother Simon, who went to England, married King John's daughter Eleanor, and became almost king himself as Earl of Leicester. At your leisure you can read Matthew Paris's dramatic account of him and of his death at the battle of Evesham, August 5, 1265. He was perhaps the last of the very great men of the thirteenth century, excepting Saint Louis himself, who lived a few years longer. M. d'Armancourt insists that it is the great Earl of Leicester who rides with his visor up, in full armour, on a brown horse, in the rose above the windows numbers 37 and 38. In any case, the windows would be later than 1240. The next pair of windows, numbers 39 and 40, also removed in 1788, still offer, in their rose, the figure of a member of the Courtenay family. Gibbon was so much attracted by the romance of the Courtenays as to make an amusing digression on the subject which does not concern us or the cathedral except so far as it tells us that the Courtenays, like so many other benefactors of Chartres Cathedral, belonged to the royal blood. Louis-le-Gros, who died in 1137, besides his son Louis-le-Jeune, who married Eleanor of Guienne in that year, had a younger son, Pierre, whom he married to Isabel de Courtenay, and who, like Philip Hurepel, took the title of his wife. Pierre had a son, Pierre II, who was a cousin of Philip Augustus, and became the hero of the most lurid tragedy of the time. Chosen Emperor of Constantinople in 1216, to succeed his brothers- in-law Henry and Baldwin, he tried to march across Illyria and Macedonia, from Durazzo opposite Brindisi, with a little army of five thousand men, and instantly disappeared forever. The Epirotes captured him in the summer of 1217, and from that moment nothing is known of his fate.