Under Tsar Mikhail Feodorovich, the construction of the first three-masted ship to be built entirely within Russia was finished in 1636. She was built in Balakhna by Danish shipbuilders from Holstein with a European design. She was christened the "Frederick". In 1667–69, the Russians tried to build naval ships in a village of Dedinovo on the shores of the Oka River for the purpose of defending the trade routes along the Volga River, which led to the Caspian Sea. In 1668, they built a 26-gun ship, the "Oryol" ("Орёл", or eagle), a yacht, a boat with a mast and bowsprit, and a few rowboats.