The Smolensk Kremlin (Russian: Смоленский кремль) is a fortified complex (kremlin) enclosing the center of the city of Smolensk in western Russia. The partially preserved fortress wall was built between 1595 and 1602, during the reigns of the tsars Feodor I and Boris Godunov. The length of the walls is about 6.5 kilometres (4.0 mi), of which less than the half was preserved. The fortifications were built under the supervision of the architect Fyodor Kon. The Smolensk Kremlin is classified as an architectural monument protected at the federal level,[1] and also has a great historical significance, in particular, as the fortress protecting the Russian state from the west over centuries.