The Duchy of Courland and Semigallia was a duchy in the Baltic region, then known as Livonia, that existed from 1561 to 1569 as a nominal vassal state of the Grand Duchy of Lithuania and subsequently
Double-Denar with monogram of Grand Duke Stephen Báthory and the coat of arms of Lithuania, minted in Mitau, 1578
Coin of the Duchy of Courland and Semigallia with portrait of Ernst Johann von Biron, coat of arms of Poland and the coat of arms of Lithuania, 1764