Which principality title did Władysław use until 1634?
Grand Duke of Muscovy
Grand Duke of Poland
Grand Duke of Sweden
Grand Duke of Austria
Answer
Władysław IV Vasa was the last king of the Polish-Lithuanian Commonwealth to use the title of Grand Duke of Muscovy until 1634, when he lost the title in a peace treaty with Russia. The title was bestowed upon Władysław by the Russian tsar in 1610, after Władysław's forces had captured Moscow during the Polish-Muscovite War of 1605-1618.
The Legacy of Władysław IV Vasa: A Fascinating Journey into the Reign of Poland-Lithuania's Ruler!