Bonifacio was active between 1447 and 1478. 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 colours illuminate the frescoes while all of the figures are drawn using thin, curving lines. He painted an altarpiece commemorating the wedding day, October 25, of Bianca and Francesco Sforza for their chapel in Sant'Agostino in 1462. Yet he had still not been paid for the altarpiece by 1469. Bembo also painted the altarpiece of Cremona Cathedral in 1467. Upon the succession of Galeazzo Maria Sforza in 1466, Bembo's work for the Sforza family increased. In 1468, the Sforzas sent him to
Pavia, where he worked for three years. While there, he painted secular decorations depicting the Duke and Duchess hunting and dining. In the summer of 1472, he began to work on a votive chapel of St Mary outside Vigevano with Leonard Ponzoni at the behest of Galeazzo Sforza. In 1460, Bembo was commissioned by Francesco Sforza to paint a portrait of him and his wife. The portraits originally hung on pillars outside the chapel of SS Daria and Grisante, again in the church of Sant'Agostino of Cremona. They were then transferred onto canvas and moved inside the chapel itself, where they both hang today. The well-preserved and detailed head of Francesco Sforza demonstrates that Bembo was a competent portrait painter. The details of Francesco's mole on his cheek, his chin folds, and his pursed lips were all captured with shadowy lines and demonstrate the competence of Bembo as an artist. ,
Collegio Castiglioni Brugnatelli, frescoes in the chapel, 1475. In 1473, he began directing the work to be done in the ducal chapel in the Castello Sforzesco. Only a few of the frescoes in the ducal chapel still survive today. It is difficult to determine the precise role Bembo played in the decoration of the chapel because he worked alongside several other artists, which would become a theme in his later life. In 1474, he worked on a chapel in the church of Santa Maria da Caravaggio alongside Giacomino Vincemala. He also worked closely with other associates on the polyptych in Pavia, where he worked with
Vincenzo Foppa and
Zanetto Bugatto. In 1476 he painted frescoes of
The Procession of the Magi and the
Annunciation in the
Collegio Castiglioni Chapel,
Pavia. His work for the Sforza court officially came to an end following the assassination of Galeazzo Sforza in 1477. He is also well known for his painting
Jesus among the Doctors which hangs in the
Pitti Palace in Florence. == Authorship ==