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The Sicilian Vespers is the revolt which eventually led to the Kingdom of the 2 Sicilians, a separation of Naples and Sicily, with the Strait of Messina dividing rather than uniting Sicily with the mainland.
“Inno di Mameli” 1847 nationalistic song list Vespers as an example of heroic patriotism (Italian National Anthem today)
Verdi’s opera: “ I Vespri Siciliani “

Frederick founded the University of Maples in 1224 and often declared his own passion for learning:
“… the inclination of our soul to the acquiring of knowledge be stronger…”

Detailed description of how feudalism worked and affected Sicilians under Norman rule.