Church of St. Erasmus, Church building in Legnano, Italy.

The Church of St. Erasmus in Legnano has a 14th-century core, a facade reworked in 1677 with pilasters and a triangular pediment portal, and exterior walls and facade rebuilt in 1925–1927 in 14th-century brick style. The interior holds a 19th-century vault fresco by Antonio Maria Turri showing angels around God the Father.

The church was built in the 14th century and restored in 1490; it appears in Goffredo da Bussero's 14th-century lists of Milanese religious buildings, when its altar was dedicated to Saint Margaret. A bequest by Bonvesin de la Riva dated 18 August 1304 assigned part of his wealth to the friars of the adjoining Sant'Erasmo hospice, demolished in 1925 to widen the Sempione road. The facade was reworked in 1677 and again in 1925–1927 under podestà Fabio Vignati.

The church is still the chapel of Legnano's hospital, and its name comes from Saint Erasmus, bishop of Formia. The medieval hospice beside it ran a ruota degli esposti, a wheel where abandoned infants could be left anonymously; the hospice also served as hospital and orphanage. Pilgrims heading to Milan along a via romea stopped here.

The church stands on Corso Sempione, the old road to Milan, and the medieval hospice beside it was demolished in 1925 to widen that road. It also serves as the chaplaincy church of Legnano's city hospital, so services may follow hospital needs. Check opening times before visiting.

Fragments of 14th- and 15th-century frescoes showing the martyrdom of Saint Erasmus, once on the hospice's outer walls, survive in the city museum, in the church, and in the hospital where the church serves as chaplaincy.