Originally the chapel attached to the Jesuit seminary of San Juan, this gem of a church is now dedicated to Our Lady of the Snows, the popular patron saint of Rome. Founded in the late 16th century, the church suffered repeated earthquake damage, but was rebuilt in the early 1700s and again in the 1770s, after the Jesuits were expelled from Mexico.
A monogram of the Virgin with crossed keys is carved in the keystone of the doorway, a reference to the statue of the Virgin of the Nativity housed in the upper shell niche. The monogram of Christ is emblazoned above the choir window. A nice touch is the fluted molding outlining the entire facade.
Despite its modest scale, Las Nieves is distinguished by the high quality and variety of its altarpieces. Although the main retablo is designed in the later neoclassical style, the gilded retablos in the transepts and side chapels are refined baroque works, reflecting both the traditional Oaxacan and more cosmopolitan Churrigueresque styles.