The early history of S. Julien is similar to that of all the other churches of Paris. Destroyed in 886 by the Normans,[96] it fell into lay hands, but was rebuilt in the 12th century, and became the property of Etienne de Vitry and Hugues de Monteler, who, in consequence of a vow made during sickness in the Holy Land, gave it over to the monks of Longport, near Monthéry, who rebuilt the church and erected a priory for fifty brothers.

The 13th and 14th centuries were periods of great intellectual activity. Students flocked to Paris from all parts of Europe, and the left bank of the Seine became a colony of colleges. According to Victor Hugo, there were no less than forty-two in 1465.[97] S. Julian was in the midst of these schools, and in the streets surrounding it were dwellings for the students of the various nationalities. The little Rue du Fouarre takes its name from fourrage, the straw upon which the students sat during the lectures; and so large was the attendance in 1535, that the authorities were obliged to erect two gates to prevent the circulation of carriages during the lessons. Brunetto Latini, Dante Alighieri, Petrarca, and Rabelais, were among the students of the Rue du Fouarre; the three last referring to it in their writings. Dante, especially, mentions his old master Sigier de Brabant in his Divinia Commedia:

Essa la luce eterna de Sigieri
Che, leggendo nel vico degli Strami,
Sillogizo' invidiosi veri. (Il Paradiso, canto x.)

The poet also bears witness to the violent discussions which took place in the street, and adds that he found comfort in going to S. Julien to say his prayers. Ambroise-Firmin Didot speaks of Dante living in the Rue du Fouarre, in vico stramineo; and Mézières adds his testimony: "Il est allé chercher la science à Bologne et entendre à Paris, dans la Rue du Fouarre, de la bouche de Sigier, ces leçons hardies qui effrayaient ces contemporains."

The colleges and dwelling-houses of the students, together with the buildings of the priory, formed a small town. In an old plan of the church, and its dependencies in the precincts, during the 14th century, we find a number of most curious names attached to the houses: Maison d'Angleterre, de la Hure, de Picardie, de Normandie, de l'Ymaige Notre-Dame, du Paon, de l'Escu de France, de la Nef[98] d'Argent, du Sabot, du Soufflet vert, du Papegaut, des Carneaulx, des Deux Cygnes, des Lyons, de la Heuze, des Trois Boittes, des Quatre filz Hémon, de la Corne de Daim, du Lièvre cornu, de la Cuiller, des Trois Canettes, du Poing d'or, de la Main d'argent, du Turbot, les Étuves de la Queue du Reynard, l'Escouvette d'or, and la ruelle du Trou-Punais; la maison des Sept-Arts, à la nation d'Angleterre; les Escolles du Cheval Rouge à la nation de Picardie, et la maison de la Corne de Cerf; these are only a few of the names. Many of the houses were demolished quite recently to make way for the Rue Monge. Much as I love Paris and admire it, I sometimes wish a new street were not obliged to proceed upon its way in a perfectly straight line, thereby destroying all that comes in its path. A remnant of the houses attached to S. Julien may be seen in the Rue Galande, No. 42, maison de la Heuze et de Saint-Julien—the bas-relief of the old portal, mentioned above.

For several centuries the old church was the seat of the general assemblies of the University; and by a decree of Philippe le Bel, the Provost of Paris was obliged to go there every two years, to take an oath to observe the privileges of the students, who were under his jurisdiction. He bore the title of Conservateur de l'Université with much pride; but he must have had a troublous life, for the students were always quarrelling with the citizens; and in the reign of Charles VI., the then Provost, Hugues Aubriot, rebuilt the Petit-Châtelet (which was close to S. Julien), in order to defend the city against the nocturnal incursions of the scholars. To such a pass had matters come in 1601, that the Parliament issued the following decree: "La court a faict inhibitions et défences aux dicts escolliers porter espées et dagues sur le quay de la Tournelle ny commettre aucune insolence." There were several classes of students, Boursiers and Pensionnaires (Convicteurs ou Portionnistes) living with the masters; Caméristes, rich young men who lived without control and were only provided with teaching and firing; Externes libres, or Martinets, troublesome students who gained their name because they rarely appeared before the Principal except for punishment with the rod or martinet; and the Galoches, who lived out of college (externes), and were named after the clogs (patins or galoches) with great nails which they wore to keep their feet dry in traversing the muddy or snowy streets. These were often older men whose presence at lectures flattered the professors. Up to the 16th century, S. Julien was also the scene of the election of the Rector of the Faculty of Arts, Rector Magnificus de l'Alma Parens; and upon these occasions, notably in 1524, the students seemed to have amused themselves, after their kind, by breaking doors and windows, wrenching knockers, and such like playful imbecilities. The next year Parliament decreed that the elections should take place elsewhere; the new localities chosen being, first the Mathurins, and then the College Louis le Grand.

The University of Paris was established in 1200, but the word was not commonly used until the time of S. Louis. In the time of Philippe Auguste there were three schools in Paris, at Notre-Dame, and at the abbeys of S. Victor and S. Geneviève. Naturally to keep so many students in order was no easy task, and we can easily understand that upon every excuse, every small discontent of the citizens, the scholars were only too glad to help in the scrimmage. They were at first classified in nations, or Société de Maîtres; thus in 1169 we read of la nation de France, surnamed Honoranda; la nation de Picardie, Fidellissima; la nation Normande, Veneranda; and la nation d'Angleterre, Constantissima. In the "town and gown" rows between students and citizens, the members of the University were only amenable to the Provost of Paris, who gloried in the title of Conservateur de l'Université; and when this gentleman found the gownsmen in the wrong, the University suspended its lectures.

But S. Julien was not simply the centre of the University; it was also the head-quarters of many guilds and corporations, such as the Confraternity of Notre-Dame-des-Vertus, the Paper-makers, the Ironfounders, and Roof-tilers.

Even before the Revolution, church property was not entirely exempt from taxation. The abbeys and other ecclesiastical communities possessed enormous privileges; but they were not enjoyed without certain obligations, as witness requisitions from the sovereigns to furnish supplies to carry on their little warlike pastimes. Sometimes the amount was sent in money, but more often in kind; a few silver saints, some golden shrines, and so on. S. Julien possessed a good revenue in the old days, but in the 16th century the priory had begun to decline in position and in wealth. The colleges moved up the "mountain" of S. Geneviève; teachers and scholars deserted the old quarters; the houses, which had been the greatest source of revenue, had begun to fall into decay; and the priors became indifferent to their business affairs, and were often absentees. At last things became so bad that, in 1643, a prior named E. Thiboust had to be deposed, and replaced, nominally by Pierre de la Valette, practically by Pierre Méliand, who accused his predecessor "d'avoir laissé dépérir l'église depuis l'an 1612 qu'il était entré en jouissance du prieuré. Et pendant cette jouissance, qui a duré 18 ans, le sieur Thiboust a laissé tomber une grande partie de l'église en ruine." Not only did prior Thiboust allow the buildings to fall into decay, but he must have kept back part of the revenues; for the next step was a petition to the King's procureur-général to beg him to oblige Thiboust to pay 16,500 livres, the repairs requisite having been estimated at that sum by the King's judges Villedo and Monnard. But notwithstanding this, Thiboust took upon himself to grant a lease to Nicolas Brossier and Edme Porrion for a certain stone quarry situated at Croix Faubin; and although the King confirmed Méliand in the priory, the audacious Thiboust pleaded youth at the time of his appointment, and subsequently shuffled out of payment of the whole sum.