Also in the 1890s, developers consolidated large land lots on the perimeter of Kitay-gorod. Savva Mamontov launched an ambitious civic center, built around an opera hall, which was completed as the Metropol Hotel in 1907, the largest early Art Nouveau building in Moscow, containing artwork by Mikhail Vrubel, Alexander Golovin and Nikolai Andreev. The eastern segment (Staraya Square) was rebuilt by the Moscow Merchant Society, with the late Art Nouveau "Boyarsky Dvor" offices (by Fyodor Schechtel) and the neoclassical 4, Staraya Square (by Vladimir Sherwood, Jr., 1912–1914) which later housed the Central Committee of the Communist Party.