The Kremlin, a word used to describe a fortified municipal center, is the historic place of power from which the czars, Soviet politicians, and, today, President Vladimir Putin rule the vast landmass that is Russia. You won't see Putin, of course, but you can walk around the grandiose square, visit the churches where czars and princes were wed, and the Armory Chamber, where jeweled state regalia, Fabergé eggs, and ancient Russian arms and armor are displayed. Inside the red wall, the Kremlin's buildings are white and yellow. You can stroll past the Senate, which unfortunately is closed to visitors; the Assumption Cathedral, the main historical church of the Russian government; the Arkhangelsky Cathedral; the Patriarch's Palace, which was built in the 16th century as the residence of Patriarch Nikon; and the Great Ivan bell-tower complex.