The term "Kremlins of Russia" refers to fortified complexes found in various cities across the country, with the most famous being the Moscow Kremlin. These structures typically include palaces, cathedrals, and defensive walls, serving as historical and political centers. Each Kremlin has its unique architectural style and significance, reflecting the local history and culture. Kremlins were originally built for defense against invasions and have evolved into symbols of power and governance. Besides the Moscow Kremlin, notable examples include the Kazan Kremlin and the Nizhny Novgorod Kremlin, each showcasing distinct features and historical importance in their respective regions.