The oldest public structure in Belgrade is a nondescript Turkish türbe, while the oldest house is a modest clay house on Dorćol, from late 18th century. Western influence began in the 19th century, when the city completely transformed from an oriental town to the contemporary architecture of the time, with influences from neoclassicism, romanticism, and academic art. Serbian architects took over the development from the foreign builders in the late 19th century, producing the National Theatre, Old Palace, Cathedral Church and later, in the early 20th century, the National Assembly and National Museum, influenced by art nouveau. Elements of Serbo-Byzantine Revival are present in buildings such as House of Vuk's Foundation, old Post Office in Kosovska street, and sacral architecture, such as St. Mark's Church (based on the Gračanica monastery), and the Temple of Saint Sava.