The respect for Slovenian architectural heritage is evident in the efforts to maintain and renovate important buildings in towns and villages. A number of Slovenian towns and cities have finely preserved medieval centres. In recent centuries a number of important Slovenian architects have left their mark on cities. Special mention should be made of Jože Plečnik, who created numerous exceptional architectural works in Ljubljana and other Slovenian cities. Slovenia’s villages and countryside have been marked by vernacular architecture, which has its own special features in different Slovenian regions. Notable structures are the Slovenian toplar (double) hayracks, Karst houses, the channelled roof tiles in the Soča region, old granaries and village wells.