What did pope nicholas v do in 1452 and 1455

pope nicholas V do in 1452 and 1455 allowed to king Alfonso to capture and enslave muslims whow ere hostile to Christiendom becouse it was reaction on Ottoman Turks siege of Constantinople, the document supposed to work temproaly ut later was somtiems use dby Portugese to justify slave tarde

Pope Nicholas V (15 November 1397 – 24 March 1455), born Tommaso Parentucelli, was Pope from 6 March 1447 until his death in 1455. The Pontificate of Nicholas seen the fall of Constantinople to the Ottoman Turks. He is the most recent pope to take the name "Nicholas" in his election.
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