View of the Commandant's Tower; Kremlin is the Russian word for "fortress", "citadel" or "castle." The earliest development of the Moscow Kremlin by the Slavs, from the 10th century to the 13th, is known only from archaeological excavations. With the formation of a powerful Russian state centred on Moscow in the second half of the 15th century and early 16th, extensive building took place in the Kremlin, and the asymmetrical triangle of high walls and towers with the Cathedral Square at the centre and four roads running to the main gates was constructed. The fine cathedrals in the main square, those of the Dormition, the Archangel Michael and the Annunciation, harmonized well with the bell-tower of Ivan the Great (1505-1508). The Arsenal (1...