Clement VI., and was crowned Prince of Fortunia at Avignon. At this time the kings of Portugal and Castile agreed to set aside their own opposing claims to the archipelago and to help Luis in the enterprise to which the Pope had thus lent his support.' But Luis never entered into possession, and Portugal and Castile kept up the struggle for the islands. Papal bulls were issued, favorable now to one and now to the other party, and the question of ownership, which was argued before the Council of Basel in 1435, was not finally settled until 1479, when, by the treaty of Alcacovas, Portugal ceded the islands to Castile.'
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