Except for its historical core, Moscow was transformed into a sprawling, often drab, but well-planned modern city under the Soviets. Post-Soviet Moscow has seen renewed construction, including the Triumph-Palace (866 ft/264 m, 2003), which echoes Stalin's Gothic-influenced Seven Sisters skyscrapers and is the tallest building in Europe. The tallest freestanding structure in Moscow is the Ostankino Tower (1967), a broadcast tower and tourist attraction that rises 1,771 ft (540 m). Among Moscow's many cultural and scientific institutions are the Moscow State Univ. (founded 1755), the Russian Academy of Sciences (founded 1725 in St. Petersburg and moved to Moscow in 1934), a conservatory (1866), the Tretyakov art gallery (opened in the 1880s), the Museum of Oriental Cultures, the State Historical Museum, the Agricultural Exhibition, the Institute of World Economy and International Relations (IMEMO), the Plekhanov Economic Academy, the Moscow State Law Academy, the Moscow Energy Institute, and the Peoples' Friendship Univ. of Russia (for foreign students). Theaters include the Moscow Art Theater , the Bolshoi (opera and ballet), and the Maly Theater (drama). Moscow is the see of a patriarch, head of the Russian Orthodox Church. The many large parks and recreation areas include Gorky Central Park, the forested Izmailovo and Sokolniki parks, and Ostankino Park, with its botanical gardens. The ornate subway system opened in 1935.