Bely Gorod (,, lit. 'white city') is the central core area of Moscow, Russia beyond the Kremlin and Kitay-gorod. The name comes from the color of its defensive wall, which was erected in 1585–1593 at the behest of tsar Feodor I and Boris Godunov by architect Fyodor Kon. The wall is 10 km in length, and its width ranges up to 4.5 m at its widest. Bely Gorod had 28 towers and 11 gates, the names of some of which are still preserved in the names of squares, namely: Trehsvyatsky, Chertolsky (Prechistensky), Arbatsky, Nikitsky, Tversky, Petrovsky, Sretensky, Myasnitsky, Pokrovsky, Yauzskiy, Vasilievsky. The walls were cogged, like the Kremlin walls, with loopholes that allowed keeping a continuous fire. During the reign of Catherine the Great and her grandson Alexander I the wall was demolished and replaced by a chain of boulevards, known as the Boulevard Ring.