The chapel of St John is on, or near, the spot occupied by a small wood church first erected in 1320; it contains several ikons of interest. On the first storey under the dome of the Assumption Tower is a chapel dedicated to St Nicholas, replacing a fourteenth-century church in the Kremlin. It is specially visited by the orthodox about to marry, and contains some ikons removed from the church of St Nicholas of Galstun, demolished during the reign of Alexander I. (1816). A deacon of the old church, Ivan Theodorof, introduced printing into Russia, and in 1567 produced a book of hours on Moscow. Hence, the book depôt lodged in the tower. Very characteristic of Moscow are these three towers, of different styles of architecture, massed to form one building; that the three should all be white is a pleasing convention which has long endured. It is needless to state that there is an excellent view from the upper storeys, one well worth the toilsome ascent. Moreover the bells are interesting; though some visitors are content with an examination of the great Bell of Moscow which, broken and flawed, stands upon a pedestal at the foot of the Ivan Veliki tower. The art of bell-founding first practised at Nola in Campania in the ninth century, has been known in Russia since the fourteenth; in 1553 a bell of about 15 tons was cast in Moscow and hung in a wooden tower. Since that date many large bells have been cast and recast. The largest, the Tsar Kolokol, the "Great Bell of Moscow," is supposed to have been first cast in the sixteenth century, probably during the reign of Boris Godunov; in 1611 a traveller states that in Moscow is a bell whose clapper is rung by two dozen men; in 1636, a fire in the Kremlin caused the bell to fall and it was broken. In 1654 it was recast and then weighed some 130 tons; it was 2 feet thick and its circumference over 50 feet. It was suspended at the foot of the tower, and the wooden beam supporting it being burned by the fire of 1706 it once more fell to the ground and broke. It was recast by order of the Empress Anne in 1733, but it is doubtful whether it was hung. From 1737 to 1836 it lay beneath the surface. By the order of the Tsar Nicholas, De Ferrand raised it from the pit and mounted it on the pedestal it now occupies. It is 2 feet thick, 21 feet high (26 feet, 4 inches with ball and cross) 68 feet in girth, and weighs 185 tons. The fragment is 7 feet high and weighs 11 tons. The figures represent the Tsar Alexis and the Empress Anne. It bears a long inscription:--