The monastery, dedicated to Saint Ambrose but also known as Our Lady of the Lamb of God, was founded in 1349 by Giovanni Visconti, bishop and lord of Milan.
Soon after the foundation, monks from this monastery, with the patronage of Galeazzo Visconti, helped found the Certosa of Pavia.
It was suppressed under the rationalist reforms of the Emperor Joseph II, Milan then being under Austrian rule, and became a parish church in 1782.
[2] The chapter house contains, in the vault, a fresco of Saint Michael by Bernardo Zenale of the early 16th century.
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