Example image of eyePlorer eyePlorer map for 'Duchy of Courland and Semigallia': Baltic states Crown of the Kingdom of Poland Duchy Polish–Lithuanian Commonwealth 1795 March 28 Partitions of Poland Russian Empire 1918 March 8 September 22 German Empire United Baltic Duchy World War I Duchy of Courland and Semigallia (1918) Latvia Livonian Brothers of the Sword Livonian War Terra Mariana Duchy of Livonia Estonia Grand Duchy of Lithuania Union of Wilno Baltic Sea Daugava River Zemgale Gotthard Kettler Diet (assembly) Jelgava List of rulers of Prussia Denmark Magnus, Duke of Holstein Piltene Prince-Bishop Wilhelm Kettler Serfdom Friedrich Kettler Kuldīga Metalworking Shipyard Riga Swedish Empire Swedish Livonia Inflanty Voivodeship Jacob Kettler Mercantilism Dutch Republic Early Modern France Kingdom of England Kingdom of Portugal