Imperial crown
A stillborn attempt to revive the kingdom of Burgundy/Arles was made by Charles of Anjou in coordination with Pope Nicholas III. Between 1277 and 1279, Charles, at that time already king of Sicily, Rudolf of Habsburg, king of the Romans and aspirant to the Imperial crown, and Margaret of Provence, queen dowager of France, settled their dispute over the County of Provence, and also over Rudolf's bid to become the sole Imperial candidate. Rudolf agreed that his daughter Clemence of Austria would marry Charles's grandson Charles Martel of Anjou, with the whole Arelat kingdom as her dowry. In exchange, Charles would support the imperial crown being made hereditary in the House of Habsburg. Nicholas III expected Northern Italy to become a kingdom carved out of the Imperial territory, to be given to his family, the Orsini. In 1282, Charles was ready to send the child couple to reclaim the old royal title of kings of Arles, but the War of the Sicilian Vespers frustrated his plans.