Duchy of Estonia (1219–1346)
The Duchy of Estonia, also known as Danish Estonia, was a direct dominion (Latin: dominium directum) of the King of Denmark from 1219 until 1346, when it was sold to the Teutonic Order and became part of the Ordensstaat. Denmark rose as a great military and mercantile power in the 12th century.
Source: Wikipedia — Duchy of Estonia (1219–1346) (CC BY-SA 4.0)