Who was the king of Spain during Ferdinand III's second year as Holy Roman Emperor?
Dukedom of Amalfi: The Duke of Amalfi is a Spanish ducal title first created in 1639 by King Philip IV for Prince Ottavio Piccolomini, a Holy Roman Imperial Army Field Marshal. Ferdinand III, Holy Roman Emperor: Ferdinand III (13 July 1608 – 2 April 1657) was Holy Roman Emperor from 15 February 1637 until his death, as well as King of Hungary and Croatia, King of Bohemia and Archduke of Austria.
King Philip IV