Tula Kremlin

The Russian city of Tula is located about 200 km from Moscow. It is one of the oldest Russian cities, the first mention of which dates from 1146. On this video you can see Tula Kremlin which was built to secure the way to Moscow and which was, like all the Russian Kremlins the beginning of the city.
At the beginning Tula was not a somehow notable town but then the ore was found at outskirts. Very fast the new handicraft of iron smelting made Tula popular. All the objects from iron were produced in Tula and dispatched by river to the towns located on the Volga and Oka. By 18 century the city grew and Peter the Great opened here the first arm factory especially for the war with Sweden. In some years the quantity of arm factories increased. Like this Tula became the main center of Russian military industry.