What duchy was founded in 1530 following the actions of the ruler of the Holy Roman Empire at that time?
Duchy of Florence:  The duchy was founded after Emperor Charles V restored Medici rule to Florence in 1530. Charles V, Holy Roman Emperor: Charles V (Spanish: "Carlos" ; German: "Karl" ; Dutch: "Karel"; Italian: "Carlo" ) (24 February 1500 – 21 September 1558) was ruler of both the Spanish Empire from 1516 and the Holy Roman Empire from 1519, as well as of the lands of the former Duchy of Burgundy from 1506.
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