The Kremlin is at the same time a fortress and a city contained within itself, with its streets and palaces, churches, monasteries, and barracks. Eighteen towers and five gateways garnish the long extent of the inclosing wall; two of the gateways are interesting; that of the Saviour built by Pietro Solario in 1491, and that of the Trinity by Christopher Galloway in the Seventeenth Century. Here, among the churches are those of the Assumption and of St. Michael; here are the new palace of the Tsar, the restored Terem (what is left of the old palace), the sacristy and library of the patriarchs, the treasure and regalia, the great tower of Ivan Veliki in which hangs the largest bell in the world that will ring, and beneath it the "Tsar Kolokol," the king of bells, which it is supposed has never been rung and the king of cannons which has never been fired. The ancient "Kazna," or treasury of the Kremlin, where the riches of the Tsars have been preserved from time immemorial was in the reign of Ivan III. situated within the walls of the Kremlin, between the Cathedrals of St. Michael and of the Annunciation. Here it remained until the great fire of 1737. The treasure had already suffered a heavy loss: in the early part of the Seventeenth Century, at the time of the war with Poland, a large quantity of plate was melted down to provide for the payment of the troops. The fire of 1737 caused a further and greater loss and destroyed also a large part of the armoury. At the time of the French invasion in 1812 the whole of the treasure, together with the regalia, was removed to Novgorod, and thus escaped destruction of seizure. On its return to Moscow in 1814, systematic arrangements were made for its preservation, and for the formation and arrangement of the museum in which it is now exhibited. In the year 1850 the new building of the Orujenaia Palata which forms part of the modern palace of the Kremlin was completed, and to this the entire collection was transferred. The treasury of Moscow has been almost from the time of the establishment of the Russian Empire the place where the riches of the Tsars have been kept; consisting of the regalia, of the state costumes, of the plate and vases used in the service of their table, of their most magnificent armour and horse-trappings, of their state carriages and sledges and of the presents which from time to time the sovereigns of other countries sent through their ambassadors, of whose embassies so many interesting accounts have come down to us. The collection of plate is exposed on open stands arranged in tiers round the pillars, or otherwise displayed in a vast hall of the new building of the Orujenaia Palata.