The church, of Romanesque origin, has baroque interiors. The church is famous above all for two tables by Ambrogio da Fossano, known as Bergognone, dated 1501 and kept in the third chapel on the left as you enter. The tables, depicting Christ at the column and Christ mocked, are inserted in a sixteenth-century polyptych referable to Bernardo Zenale, in the chapel dedicated to St. Joseph. Until a few years ago these tables were considered works of the school of Bernardino Luini, but recent studies have denied their authorship by assigning them to a Bergognone of full maturity, welcoming Leonardo's and Bramante's inspirations [1]. Curiously, the artist left a fingerprint on the first panel that can be seen near the internal access door to the portico in the background of the Flagellated Christ. At the center of the polyptych is a tempera painting depicting the Nativity with an unusually young Saint Joseph. The lunette depicts the Eternal Father holding the fate of Creation in his left hand. On the sides, the prophets David (recognizable by the crown) and Isaiah sculpted in high relief as well as the Annunciation on the entablature. In the tympanum, above, a group of angels with the cartouche of "Glory to God in the highest". The predella contains three panels depicting The Adoration of the Magi, The Presentation of Jesus in the Temple and The Flight into Egypt. The lateral panels of the Bergognone were placed in the ancona at a later time, probably in the nineteenth century, to replace parts of the Zenale polyptych.
source: wikipedia