What is Ruhnu?
{{Infobox settlement | name = Ruhnu | other_name = {{Lang|sv|Runö}} | settlement_type = | image_skyline = | imagesize = | image_caption = | image_flag = Flag of Ruhnu Parish.svg | flag_size = 125px | image_shield = Ruhnu valla vapp.svg | coordinates = {{coord|57|48|N|23|15|E|region:EE|display=inline,title}} | pushpin_map_caption = | pushpin_map = | pushpin_relief = yes | pushpin_label = Ruhnu | shield_size = 75px | subdivision_type = [[List of sovereign states|Country]] | subdivision_name = [[Estonia]] | subdivision_type1 = [[Counties of Estonia|County]] | subdivision_name1 = [[Saare County]] | seat_type = Administrative centre | seat = Ruhnu village | area_total_km2 = 11.9 | population_total = 136 | population_as_of = 06.03.2023 | population_density_km2 = 8.2 | website = {{URL|http://ruhnu.ee}} | official_name = }} '''Ruhnu''' is an [[Estonia]]<nowiki/>n island in the [[Gulf of Riga]] in the [[Baltic Sea]]. It is part of [[Saare County]] but is close to the Latvian mainland. It is 11.9 square kilometres (4.6 sq mi), 150 people live there. Ruhnu Parish has the smallest population of Estonia's 79 [[Municipality|municipalities]]. Before 1944, it was for centuries populated by ethnic [[Sweden|Swedes]] and traditional Swedish law was used. Almost all the Swedish people left for Sweden during the [[World War II|second World War]]. The island's wooden church was built in 1644. It is one of the oldest wooden buildings in Estonia. There is an airfield with flights from [[Pärnu]] and [[Kuressaare]]. There is a light