Each of the towers was designated by a particular name, according to its history, or the purpose it was intended to serve. The Big Tower was also called the Ferrand Tower, from the Count of Flanders having been confined in it; and there were also the Library Tower, where Charles V. had brought together 959 volumes, which formed the nucleus of the National Library; the Clock Tower, the Horseshoe Tower, the Artillery Tower, the Sluice Tower, the Falcon Tower, the Hatchet Tower, the tower of the Great Chapel, the tower of the Little Chapel, the Tournament Tower (where the king took up his position to see tournaments and jousts), besides others. Charles V. added to the Louvre a number of buildings for tradespeople and domestics, whose services had to be dispensed with when the Louvre was purely a military building. Such names as pantry, pastry, saucery, butlery, were given to the different buildings and departments by the bakers, the pastry-cooks, the makers of sauces, and the keepers of the wine. The gardens of the Louvre, though not very extensive, were greatly admired. Here were to be seen aviaries, a menagerie of wild beasts, and lists for different kinds of sports and combats. Charles VI., who lived by preference at the Hôtel St. Pol, increased the fortifications of the Louvre, and sacrificed to that end the gardens of the king and queen on the side of the river. The succeeding kings until the time of Francis I. occupied themselves very little with the Louvre, and scarcely ever resided there. During this first period of its history, from Philip Augustus until Francis I., the Louvre was the scene of numerous historical events. In 1358, during the captivity of King John in England, the citizens of Paris, in support of the deputies of the communes in the States-General, besieged and took the Louvre, driving away the governor, and carrying off to the Hôtel de Ville all the arms and ammunition they could find in the arsenal of the fortress. Soon afterwards the governor, Pierre Gaillard, was decapitated by order of the Dauphin Regent for making so poor a defence. It was at the Louvre, moreover, in 1377, that the Emperor of Germany, Charles IV., allied himself with Charles V. of France, to make war upon England. Under the reign of Charles VI., in 1382, while the king was engaged in suppressing an insurrection in Flanders, the Parisians, in their turn, revolted, and proposed to destroy alike the fortress of the Louvre, and that other fortress, destined five centuries later to fall beneath the first blows of the Revolution. They were counselled, however, by one of their leaders to spare both prison and palace; and the advice was sound, for after quieting the turbulent Flemings, the king returned to Paris more powerful than ever. In 1399, Andronicus, and in 1400, Manuel Palæologus, both Emperors of Constantinople, were entertained at the Louvre, as were also, in 1415, Sigismund, Emperor of Germany, and, in 1422, the King and Queen of England.