Saint Ambrose Church, Baroque church in Cinisello Balsamo, Italy.

Saint Ambrose Church is a baroque structure with a broad central nave and light-colored marble altar at its heart. The side facades feature decorative terracotta cladding that adds texture and warmth to the building's exterior.

A parish church existed here by the end of the 15th century, built on a raised platform against stagnant water and served from Desio; the first recorded rector was Mario Marliano around 1530. Don Maffeo Belloni rebuilt it as a single nave in 1574–1579, and after the plague Don Francesco Solari had Giovanni Battista Guida Bombarda rebuild it again in 1636–1644. Don Antonio Longhi lengthened it in 1724–1727, adding the bell tower.

The church follows the Ambrosian Rite, an Eastern-influenced Catholic tradition distinct from Roman practices, which shapes how services unfold. Local residents gather here for major feasts and daily worship, making it central to the neighborhood's spiritual rhythm.

The church sits on Piazza Gramsci and is easy to reach on foot from the town center. Visitors should check service times before arriving, as access depends on when worship is scheduled.

The bell tower only arrived in 1724-1727, during the lengthening works begun by don Antonio Longhi on the wish of his brother and predecessor don Gaspare. Its five bells in Si2 were cast in Varese in 1841 by the Felice Bizzozero foundry; the third, cracked, was recast by the same foundry two years later, and the ringing is now fully automated.