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In page Maria of Calabria:

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Maria and her husband Charles headed a faction opposing Maria's sister Queen Joanna of Naples and her second husband, Louis of Taranto. On 15 January 1348, Maria's husband was named Lieutenant General and Governor of the Kingdom of Naples. Charles apparently seeing an opportunity to claim power when the King and Queen of Naples had fled Naples in the face of an invasion by King Louis I of Hungary. He was however captured by the Hungarians only days later, near Aversa. On 23 January 1348, Maria's husband was decapitated in front of San Pietro a Maiella. His period of power had lasted less than a week.[citation needed] Maria thus became a nineteen-year-old widow.