Thus the legend. But the chapel is mentioned for the first time in authentic documents of the year 1213, when it is described as situated on the vast territory belonging to S. Germain l'Auxerrois (the eldest daughter of Notre-Dame), at a little distance from the cemetery of the Holy Innocents, upon the road leading from the capital to Montmartre. Whoever may have been the founder, it is mentioned in this same year (1213) as a parish, for the _curé_ appealed to the abbot of S. Geneviève, and the dean of Notre-Dame de Chartres, in the matter of a squabble between himself and the dean of S. Germain l'Auxerrois. Ten years later, it is called the church of S. Eustache, in a charter giving the sentence delivered by the bishop of Paris and two of his canons in another squabble between Simon, _prestre de l'église Saint-Eustache_, and the dean of S. Germain, who seems to have been of a combative temperament. This _curé's_ name figures at the head of the list of rectors of the church, which ends with another of the same name, the grand abbé Simon who was seized by the Communists, and all but received martyrdom with Archbishop Darboy and the _curé_ of the Madeleine, Duguerry. L'abbé Le Beuf records the increase of population, and the necessary want of a larger church; consequently some relics of S. Eustache preserved at S. Denis were brought to Paris, and became the reason for the substitution of the Roman warrior for the gentle maiden Agnes as patron of the church. But later, the two Saints were combined in the patronage, probably from the crypt under the Lady Chapel bearing Agnes' name--a crypt that would be more truthfully called a cellar, from the use it is, or was, put to by a neighbouring fruiterer. The lease may have run out lately, in which case it now belongs to the church; as the clergy had determined to regain possession as soon as possible. What appearance the first church presented, we know not, but in 1429 the high altar was advanced a foot into the chancel, and the altar of S. Gregory destroyed, to make a passage to the crypt of S. Agnes. In 1434, the church was enlarged "_pour la multiplication du peuple_"; and again in 1466, an addition required the demolition of the greater part of a house in the Rue de Séjour (now Rue du Jour), next to the Hôtel de Royaumont. Thirty years later the bishop gave the churchwardens a little piece of ground situated at the corner of Pont-Alais, in the Rue Montmartre, in order to extend the building still farther. Here a slight digression may not be out of place to relate the legend of S. Eustache, whose _fête_ day occurs on September 20th, a day, among several others, when the church is visited by crowds, some of whom go to pray, and others to hear the exquisite music for which S. Eustache is famous. When the 20th falls on a weekday, the festival is transferred to the following Sunday.