Archduchy

noun

1. The territory over which an archduke or an archduchess has authority.
2. The territory or rank of an archduke or archduchess.
3. The territory of an archduke or archduchess.
4. The territority (principality) of an archduke
5. The archduchies Austria and Brabant (as well as its rival Gelre) claimed this rare, primordial vassalitic rank as the successors to the former Carolingian kingdom and first archduchy Lotharingia (the name later became Lorraine), which had been divided in an Upper - and a Lower dukedom within the Holy Roman Empire