Art Center, and the Oriental Pearl Tower. Despite rampant redevelopment, the Old City still retains some traditional architecture and designs, such as the Yu Garden, an elaborate Jiangnan style garden. As a result of its construction boom during the 1920s and 1930s, Shanghai has among the most Art Deco buildings in the world. One of the most famous architects working in Shanghai was László Hudec, a Hungarian-Slovak who lived in the city between 1918 and 1947. His most notable Art Deco buildings include the Park Hotel, the Grand Cinema, and the Paramount. Other prominent architects who contributed to the Art Deco style are Clement Palmer and Arthur Turner, who together designed the Peace Hotel, the Metropole Hotel, and the Broadway Mansions; and Austrian architect C.H. Gonda, who designed the Capitol Theatre. The Bund has been revitalized several times. The first was in 1986, with a new promenade by the Dutch architect Paulus Snoeren. The second was before the 2010 Expo, which includes restoration of the century-old Waibaidu Bridge and reconfiguration of traffic flow. One distinctive cultural element is the shikumen (, "stone storage door") residence, typically two- or three-story gray brick houses with the front yard protected by a heavy wooden door in a stylistic stone arch. Each residence is connected and arranged in straight alleys, known as longtang (). The house is similar to western-style terrace houses or townhouses, but distinguishes by the tall, heavy brick wall and archway in front of each house. The shikumen is a cultural blend of elements found in Western architecture with traditional Jiangnan Chinese architecture and social behavior. Like almost all traditional Chinese dwellings, it has a courtyard, which reduces outside noise. Vegetation can be grown in the courtyard, and it can also allow for sunlight and ventilation to the rooms. Some of Shanghai's buildings feature Soviet neoclassical architecture or Stalinist architecture, though the city has fewer such structures than Beijing. These buildings were mostly erected between the founding of the People's Republic in 1949 and the Sino-Soviet Split in the late 1960s. During this time period, large numbers of Soviet experts, including architects, poured into China to aid the country in the construction of a communist state. An example of Soviet neoclassical architecture in Shanghai is the modern-day Shanghai Exhibition Center. Shanghai—Lujiazui in particular—has numerous skyscrapers, making it the fifth city in the world with the most skyscrapers. Among the most prominent