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What role did Pope Nicholas V play at the Council of Ferrara-Florence?

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Montúfar, Antonio: Saint Francis of Assisi Appearing Before Pope Nicholas V, with Donors — Nicholas V *Saint Francis of Assisi Appearing Before Pope Nicholas V, with Donors*, oil on canvas by Antonio Montúfar, 1628; in the Los Angeles County Museum of Art. 107.95 × 87.63 cm.

At the Council of Ferrara-Florence (1438–1445), the future Pope Nicholas V—then known as Tommaso Parentucelli—played a significant diplomatic role. He led the discussions with the Armenians, Copts, and Jacobites in an effort to resolve their doctrinal differences with the Latin church.1