In 1229 he became King of Jerusalem after making a deal with the sultan of Egypt, and later he made a similar deal with his own lords, granting them nearly complete rights on their own lands so that he could rule as an absolute monarch in Sicily and Lombardy.  
His chronicler Salimbene alleged that he was an Epicurean and it was rumored that he kept a harem full of Muslim women.  A great patron of the arts, he founded the University of Naples and wrote a treatise on falconry.  In 1229 he became King of Jerusalem after making a deal with the sultan of Egypt, and later he made a similar deal with his own lords, granting them nearly complete rights on their own lands so that he could rule as an absolute monarch in Sicily and Lombardy.  This alarmed Popes Gregory IX and Innocent IV and eventually led to war.  FTP name this grandson of Frederick Barbarossa, who tried to add much of Italy to the Holy Roman Empire.
His chronicler Salimbene alleged that he was an Epicurean and it was rumored that he kept a harem full of Muslim women.  
Frederick II Hohenstaufen