His earliest attributed work is the Cavalcabò chapel in the same Sant'Agostino. Giovanni Cavalcabo paid for the decoration of the chapel in 1447 and it took approximately five years to complete. Strangely, there is no connection between Bembo and the chapel; however, following the publication of Wittgen in 1936, the chapel has been attributed to him. While painting the decorations of the chapel, Bembo showed fine style demonstrating the influence of Michelino da Besozzo and the Zavattari brothers. The frescoes in the chapel depict Evangelists and the coronation of Christ and the Virgin. Bright colors illuminate the frescoes while all of the figures are drawn using thin, curving lines.