What is Yonne?
{{About|the French department|other uses|Yonne (disambiguation)}} {{Infobox settlement | name =Yonne | native_name = | native_name_lang = | type =[[Departments of France|Department]] | image_skyline =FR-89-Auxerre12.JPG | image_alt =Prefecture building of the Yonne department, in Auxerre | image_caption =[[Prefectures in France|Prefecture]] building of the Yonne department, in Auxerre. | image_flag =Drapeau fr département Yonne.svg | flag_size=125px | flag_alt = | image_shield =Blason département fr Yonne.svg | shield_size= | shield_alt =Coat of arms | nickname = | motto = | image_map =Yonne-Position.svg | map_alt = | map_caption =Yonne in France | pushpin_map = | pushpin_label_position = | pushpin_map_alt = | pushpin_map_caption = | coordinates = {{coord|47|48|N|3|34|E|region:FR_type:adm2nd|display=inline,title}} | subdivision_type =Country | subdivision_name =[[France]] | subdivision_type1 =[[Regions of France|Region]] | subdivision_name1 =[[Bourgogne-Franche-Comté]] | established_title =Département | established_date =4 March 1790 | founder = | seat_type =[[Prefectures in France|Prefecture]] | seat =[[Auxerre]] | parts_type =[[Prefectures in France|Subprefectures]] | parts_style =para<!-- list, coll (collapsed list), para (paragraph format) --> | p1 = [[Avallon]] | p2 = [[Sens]] | government_footnotes = | leader_party = | leader_title =[[President of the Departmental Council|President]] | leader_name =André Villiers<ref>{{cite web |url=http://www.cg89.fr/Le-Conseil-Departemental/Le-fonctionnement-du-Conseil-Departemental/Les-42-elus |title=Les 42 élus |work= |publisher=C