The KremlinImposing crenelated walls encircle the splendid domes of the churches and cathedrals, as well as the elegant silhouettes of the palaces. Carlos Rodrigues
Every time Moscow extended, it grew out around the Kremlin in a series of concentric rings. The planning very clearly shows four belts cut across by the radiuses of the large boulevards. Beyond the Kremlin, the second circle is made of the old district of Kitai Gorod, itself once had fortifications of which only a few ruins remain. The third ring, the Boulevard belt, used to be the limit of the 'white city', and the last ring or ?Garden Belt', marks the border between the city and its modern outskirts. Far from there, Moscow is surrounded by a ring road.