Ancient Persian and Arabic books report on three centers of Rus' - Cuiab, Slavia and the “island of Rus” - Artania. Everything is clear with the first two, Cuiaba is Kyiv, Slavia is old Slovensk, the predecessor of Veliky Novgorod, but scientists have been searching for Artania for 200 years. Wherever they tried to localize it! And on o. Rügen, and in Taman, and in the foothills of the Carpathians, and in the region of present-day Perm, and, finally, in the area between the Oka and Volga rivers. The legend of the Meshchera forests about the three king-magi named Kasym, Kadmus and Ermus, who ruled Artania. From the legend it follows: Artania is a river island, between the Oka and Volga rivers. But if you compare the stories of the Persians and Arabs with the geography, toponymy and legends of the Golden Ring of Russia, the alchemical essence of the latter will be revealed. The Rus-Arsa themselves will appear as the keepers of the secret of alchemical transmutation. Oleg Fomin, known as a commentator on alchemical texts, turning to Russian antiquities, reveals, using the traditionalist method, a whole layer of Hermetic mythology, sometimes going far beyond the scope of special research.