A sixth enlargement took place about the middle of the XIVth century. The monastery of the Jacobins, which now forms a portion of the prefecture, was enclosed within the walls of the town, as also the Church of Saint-Peter-le-Portier, so that it obliged them to put the porte Cauchoise farther out. On the east, the town was enlarged by the quarter of the Marequerie. It is not probably to Rollo, the first duke that we owe the institution of the exchequer. The first trace of it, is only found under William-the-Conqueror. Perhaps even, it was only known under his son Henry Ist «the King Duke.» Ancient writers have thought that an exchequer existed in England before the conquest. The learned Madox, on the contrary, (vol. 1st page 177 and following) declares, that he has not found in any document prior to William's expedition, the word scaccarium (or exchequer). But he finds it shortly after that time, from which it would appear natural to conclude that, that institution had been carried over by that prince. The exchequer was removed sometimes to Rouen, at other times to Caen, and sometimes to Falaise. Louis XIIth fixed this sovereign court at Rouen, in 1449, and opened it on the 1st october of the same year. Francis Ist raised the exchequer into a parliament in the year 1515. It was interdicted in the month of August 1540, but the 7th January 1541, was reinstated. Thick walls, deep ditches, and formidable towers, a great many turrets, bastions, casemates, and fortified gates, made Rouen an important place, before the revolution: omitting the different sieges, which it had to sustain from the Normans, we must notice in 949 those by Otho, emperor of Germany, Louis IVth, king of France, and Arnould count of Flanders; that in 1204 by Philip-Augustus, 1418, by Henry Vth king of England; that in 1449, after which, Charles VIIth retook the town from the English; lastly, that of 1591, by Henry IVth. In all these sieges, and many more which I have not mentioned, the inhabitants of Rouen always gave proofs of great valour and sometimes of a resignation without example. All the fortifications of the town have disappeared since the revolution; its ancient appearance, is now only found in the interior, in its religious monuments and a few houses, which time or the hand of man appears to have forgotten. Before 1790, Rouen contained thirty seven parochial churches and about as many religious communities of both sexes. It now only contains six parochial churches, and eight chapels of ease, with a church for the use of protestants.