The Duchy of Livonia (Polish: Księstwo Inflanckie; Latin: Ducatus Ultradunensis; Estonian: Üleväina-Liivimaa hertsogkond; Latvian: Pārdaugavas hercogiste; also referred to as Polish Livonia or Inflanty) was a territory of the Grand Duchy of Lithuania – and later the Polish–Lithuanian Commonwealth – that existed from 1561 to 1621. It corresponds to the present-day areas of northern Latvia and southern Estonia.
Read more about Duchy Of Livonia: History, Administrative Divisions