Andrea del Castagno was an Italian painter born in 1410 in the Tuscan town of Castagno. He was known for his frescoes and portraits, which were characterized by their realism and attention to detail. Castagno was trained in the Florentine workshop of Masolino da Panicale, where he learned the techniques of fresco painting. He later worked in the workshop of Paolo Uccello, where he developed his interest in perspective and geometric forms. Castagno's most famous works include the frescoes in the Brancacci Chapel in Florence, which depict scenes from the life of St. Peter. He also painted portraits of prominent figures of his time, including the condottiere Niccolò da Tolentino and the humanist scholar Marsilio Ficino. Castagno died in Florence in 1457, leaving behind a legacy of innovative and influential art.