Alfonso III d'Este was an Italian nobleman born in 1393, known for being the Duke of Ferrara. He belonged to the prominent Este family, which played a significant role in the politics and culture of Renaissance Italy. Alfonso's reign lasted from 1431 until his death in 1450, during which he worked to strengthen his duchy and promote the arts. Under Alfonso's rule, Ferrara became a center of culture and learning. He was a patron of artists and scholars, contributing to the flourishing of the Renaissance in the region. His efforts helped establish Ferrara as an important cultural hub in Italy.