+A **Grand Duke** is a hereditary monarch, holding a rank considered above a [Duke](/wiki/duke) but below a [King](/wiki/king). This sovereign title was commonly held by rulers of independent European [Grand Duchies](/wiki/grand_duchy), often bridging the gap between lesser nobility and royalty.
+## See also
+- [Monarchy](/wiki/monarchy)
+- [Nobility](/wiki/nobility)
+- [Prince](/wiki/prince)
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