ial vein that the representatives of the "mining empire of the Tverdyshevs–Myasnikov"possessed. In 1754, a contract was signed for the construction of the Zlatoust plant by the Tula merchant Mosolov. In 1761, the Zlatoust plant went into operation and became an iron-smelting, jelly-making, and then copper-smelting plant. In 1768, V. M. Mosolov sold the plant to L. I. Luginin, who greatly expanded production, bought the Satka plant and founded the Miass, Ku Sin and Arta plants. Built by N. N. Demidov in 1761, the Azyash-Ufa plant was burned by the troops of E. I. Pugachev and was no longer restored, as evidenced by its skeletons found at the end of the XX century. An attempt to build a factory near the Chelyabinsk fortress - "Chelyabinsk copper Smelting plant" by P. I. Repnin was unsuccessful due to the lack of forest land and the opposition of the Bashkir and Cossack population: the lawsuit lasted for more than eleven years: from June 1758 to August 1769. By the end of the XVIII century, the Urals became the main area of metal production in the country. The region produced 80 of Russias cast iron and 100 of its copper, with a large share owned by South Ural plants. In 1797, gold was found in the Southern Urals, and in the 1820s, its industrial production began. One of the mines was named in honor of Alexander I – Tsarevo-Alexandrovsky, and in 1841, Nikifor Syutkin found a nugget weighing almost 37 kg, called the "Golden Triangle", now stored in the Diamond Fund. In 1815. At the Zlatoust Factory, a weapons factory begins to operate, foreign craftsmen come, and in the 1830s a new building in the late-century style is being built for it.
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