Ambrogio Borgognone (variously known as Ambrogio da Fossano, Ambrogio di Stefano da Fossano, Ambrogio Stefani da Fossano or as il Bergognone or Ambrogio Egogni c. 1470s – 1523/1524) was an Italian painter of the Renaissance period active in and near Milan.
While he was nearly contemporary with Leonardo da Vinci, he painted in a style more akin to the pre-Renaissance, Lombard art of Vincenzo Foppa and Bernardino Zenale. The dates of his birth and death are unknown; he is said to have been born at Fossano in Piedmont and his appellation attributed to his artistic affiliation with the Burgundian school.
His fame is principally associated with his work at the Certosa di Pavia complex, composed of the church and convent of the Carthusians. It is unlikely he designed, in 1473, the celebrated facade of the Certosa itself. He worked there for eight years starting in 1486, in collaboration with his brother Bernardino Bergognone, when he furnished the designs of the figures of the virgin, saints and apostles for the choir-stalls, executed in tarsia or inlaid wood work by Bartolomeo Pola, till 1494, when he returned to Milan. Only one known picture, an altar-piece at the Basilica of Sant'Eustorgio, can with probability be assigned to a period of his career earlier than 1486.
For two years after his return to Milan he worked at the church of San Satiro. From 1497 he was engaged for some time in decorating with paintings the church of the Incoronata in the neighboring Lodi. Documentation of him thenceforth is scant. In 1508 he painted for a church in Bergamo; in 1512, his signature appears in a public document of Milan; in 1524 - and this is our last authentic record - he painted a series of frescoes illustrating the life of St. Sisinius in the portico of San Simpliciano at Milan. Borgognone considered a modestly talented painter with marked individuality. He holds an interesting place in the most interesting period of Italian art.