Nicholas V
Tommaso Parentucelli · 1447 – 1455
Founded the Vatican Library, launched the Renaissance papacy, and watched Constantinople fall to the Ottomans.
Nicholas V was a scholar who became pope in 1447 and turned the Vatican into the intellectual center of Europe. He founded the Vatican Library, hiring agents across the continent to buy and copy manuscripts. He employed translators to render Greek classics into Latin and commissioned architects and artists to begin transforming Rome. Fra Angelico painted frescoes for him. Leon Battista Alberti advised him on urban planning. But the great shadow over his pontificate was the fall of Constantinople to the Ottomans in 1453. Nicholas tried desperately to organize a military response from European powers and failed. The Christian East was lost, and he knew it. He also issued the controversial bull Dum Diversas in 1452, which granted Portugal the right to enslave non-Christians, a document that modern popes have repudiated.
The Library Builder
Nicholas V understood that books matter. The manuscripts he collected and commissioned became the foundation of the Vatican Library, one of the most important collections in human history. He saved texts that might otherwise have been lost and made Rome a destination for scholars across Europe.
Dum Diversas and Its Legacy
Nicholas V's bull authorizing the enslavement of non-Christians is indefensible by modern standards and has been formally repudiated by recent popes. It is a reminder that papal authority has sometimes been used to justify grave injustice, and the Church has had to reckon with that history honestly.