The architecture in the city is a mixture of local (Georgian) and Byzantine, Neoclassical, Art Nouveau, Beaux-Arts, Middle Eastern, and Soviet modern styles. Very few buildings survived the destruction of the city in 1795, so most historical buildings in Tbilisi date to the Russian Imperial period (1801–1917). The oldest parts of the city (Kala, Abanotubani, Avlabari) were largely rebuilt on their medieval street plans, and some old houses were even rebuilt on much older foundations. The areas of downtown Tbilisi which were developed according to a European-style plan by Russian authorities (Sololaki, Rustaveli Avenue, Vera, etc.) have a Western appearance, with a mix of styles popular in Europe at the time: Beaux Arts, Orientalist, and various period revival styles.