The Church of Caponago has very ancient origins, probably dating back to the late Middle Ages. From historical documents we know that a church certainly already existed at the end of the 13th century, as it is mentioned in the work of Goffredo da Bussero. We do not know what this church originally looked like, but in 1581, when it was visited by Saint Charles Borromeo, it was described as “small and quite unseemly due to its age.” For this reason, the wealthy landowners of the area were strongly urged by Saint Charles himself to take care of its restoration. In fact, the first major restoration of the church took place only two centuries later, when the earlier building was incorporated into a new structure designed by the architect Carlo Giuseppe Merlo, which is essentially the one that still stands today. The reconstruction and redesign work began in 1738, again under the direction of Carlo Giuseppe Merlo. The new parish church incorporated the presbytery and choir of the previous building and was completed around 1742 (the façade was finished later). The resulting layout features a central/elliptical plan, in keeping with the architectural trends of the period. A few years later, in 1783, the bell tower was also built. The interior was frescoed toward the end of the 19th century (with works attributed to the painter Antonio De Grada), and the organ, dating back to 1768 and built by Antonio Fontana, underwent restoration and adaptations during the same century (with rebuilding and partial restoration around 1894–1896). Between 1933 and 1940, the church underwent an enlargement of the nave, an intervention that brought the building to its present dimensions.