Moscow Kremlin
Kremlin, Moscow, RussiaThe most important event during Dmitry's early reign was to start building the Moscow Kremlin; it was completed in 1367. Dmitri Donskoi replaced the oak walls with a strong citadel of white limestone in 1366–1368 on the basic foundations of the current walls. Thanks to the new fortress, the city withstood two sieges by Algirdas of Lithuania during the Lithuanian–Muscovite War (1368–1372).