Duke of Estonia

During the 1266-82 reign of the queen dowager Margaret Sambiria, the title lady of Estonia (Latin: Domina Estonie) was used.

To govern the Duchy of Estonia, the king of Denmark and royal counsellors appointed the Lieutenant (Latin: Capitaneus), who resided in Reval.

[4] The king of Denmark sold the duchy to the Teutonic Order in 1346, but Christian I reassumed the title of duke of Estonia in 1456.

[5] After the Livonian War, Estonia became part of the Swedish Empire, and the title was gained by kings of Sweden.

[6] Crown Prince Gustav Adolph was already Duke of Estonia 1607-1611 before he became King, but then officially abolished all Swedish duchies in 1618.

Portrait of King Gustav II Adolph of Sweden including Duke of Estonia in his stated titles