Philip, 'the Fair' or 'the Handsome', was indeed a handsome and talented youth with a mind of his own. At sixteen he came of age officially and became ruler of Burgundy. Immediately he quarrelled with his father, Emperor Maximilian I, because he wanted to keep Burgundy out of his father's endless struggle with France. 
Philip's marriage to Juana of Aragon turned out to be politically more useful, but it brought no happiness. Philip was an extrovert and something of a womanizer, whereas Juana, with the taint of madness in her family, combined a brooding religious fanaticism with an overpowering sensuality. In her jealousy she resorted to violence, attacking Philip's mistress. 
After the death of his mother-in-law, Philip became King of Castile. Less than two years later Philip died suddenly, rumoured to have been poisoned by his wife in a fit of jealousy, or else by his father-in-law who took over the Regency for Philip's son, Charles. 
Having adored him, been wildly jealous of him, then made his life a misery, Juana granted him no peace even in death. She had been told of a prince who had come to life after fourteen years in the grave, and 
so she watched over Philip's open coffin for fourteen years. 
 

Source: Leo van de Pas