Passage: The Duchy of Livonia (Polish: Księstwo Inflanckie; Lithuanian: Livonijos kunigaikštystė; 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.

Question: What years did the Duchy exist?
1561 to 1621