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In 1502 the last direct claimant of the Byzantine Crown Andreas Palaeologus died after he had sold his title to the Aragonese King...
By that time there was another Palaeologian who had a claim to the Byzantine Crown... William IX Palaeologus Margrave of Montferrat...
WI he declared himself Emperor of Byzantium in 1502? Could he had provoked a Crusade against the Ottomans (with the help of France or another foreign power)?
Any thoughts?