Chiesa del Santissimo Corpo di Cristo, Religious building in Castiglione Olona, Italy.

The Chiesa del Santissimo Corpo di Cristo has a cubic exterior divided by fluted sandstone pilasters with Corinthian capitals, supporting a frieze painted with putti and garlands. A cylindrical drum with eight oculi carries a hemispherical dome topped by an octagonal pavilion roof on sixteen white marble columns. The interior square hall is twice the width of the apse, whose semi-spherical vault is built in herringbone pattern.

Built between 1437 and 1444 on the site of a 13th-century oratory dedicated to the Holy Sepulchre, the church was commissioned by Cardinal Branda Castiglioni as part of his renewal of his native village. It is considered the first Brunelleschian building outside Tuscany, likely the work of a Tuscan master close to Brunelleschi, perhaps the Vecchietta.

The church is also called chiesa di Villa because it served the old borgo. Its name honoured the Santissimo Corpo di Cristo and the Four Doctors of the Western Church. In the apse, the altarpiece holds a polychrome stone sculpture of the Body of Christ, and the lower apse walls carry floral paintings with a risen Christ above.

The church is located in the heart of Castiglione Olona and is easily walkable from the town center, with interior access typically available for visitors. It is best to check opening hours ahead of time and wear respectful clothing when visiting a sacred space.

The apse vault is self-supporting and built in a herringbone pattern, slightly flattened at the top. The same technique appears in the dome, which rests on a cylindrical drum pierced by eight oculi and is topped by an octagonal pavilion roof on sixteen white marble columns. No construction documents survive, yet these details point to a master trained near Brunelleschi.