During the guided tour you'll walk along the narrow streets of the Medieval Hanseatic Old Town and enjoy the splendors of the Dome cathedral, Old Guild house, and Riga castle. The walking tour starts at the Town Hall Square which was the central square of the city from 13th up to 19th century. The most famous building of the square is the magnificent gothic House of the Blackheads. During the tour you will also see such famous spots of Riga as St. Peters Church, Swedish Gates, and Powder Tower.  Roughly thirty per cent of buildings in the center of Riga are art nouveau, which is more than any other European city. Moreover, art and architecture connoisseurs believe that it is in Riga that art nouveau found its especially powerful and sweeping expression. In order to preserve Old Riga, Riga’s wooden building,s and the art nouveau architecture, the historical center of Riga has been designated a UNESCO World Heritage Site. The areas where art nouveau features most lavishly are Alberta Street and the so-called embassy district nearby.