On 23 April 1323, Elizabeth married Peter II of Sicily (Trinacria), son of Frederick III, King of Sicily (1271- June 25, 1337) and Eleanor of Anjou (1289- August 9, 1341) a little more than a year after his coronation. Speculation by Francesco Testa suggests that Elizabeth was not Frederick III's first choice for a daughter-in-law. Frederick wished to marry his heir to Beatrice, the daughter of the Holy Roman Emperor, Henry. Instead, Beatrice married Charles of Hungary, a nephew of king Robert of Naples, Frederick's main enemy. In turn, Frederick married his eldest son and heir to Elizabeth of Carinthia, whose family was in fierce rivalry to Beatrice's (John of Luxembourg, Beatrice's brother, had taken the Behemian crown from Elizabeth's uncle and caretaker Henry).