As you may know, the italian kingdoms of Sardinia, Naples and Sicily became subjects under the crown of Aragon during 15th and early 16th centuries.
I want to know from you how could've history turned during 16th century in order to make these three nations independent from Aragon/Spain (as one single kindgom, or Naples-Sicily and Sardinia, or Sardinia-Sicily and Naples, or as three separate entities, whatever) before 17th century.
Once I've read here in a topic that if Holy Emperor Charles had other sons besides Philip II, probably he would've ceded Burgundy/Netherlands to the second-born son and the italian kingdoms to the third son (or further sons) if necessary. Do you think that it'd be possible?