Collegiata di Santa Maria Assunta, Gothic church in Chivasso, Italy.

The Collegiata di Santa Maria Assunta is a church in Chivasso built with three naves and a terracotta-decorated facade showing 15th-century artistic details. Inside, you find sculptural and painted works that reflect the artistic traditions of the Piedmont region.

Construction started in 1415 under Marquis Theodore II of Montferrat and continued over several decades. The main nave vault was raised in 1475 and the bell tower finished in 1487.

Locals call the church "il Duomo", though it is properly a collegiate church, a title Bishop Luigi Bettazzi of Ivrea granted in 1996 because it was the seat of a chapter of canons. The octagonal stone tower near the facade is all that remains of the marquis's palace.

The interior is divided into three naves; the original Gothic brick structures are visible in the right nave, re-exposed in the 1930s-40s and redecorated with neo-Gothic frescoes. The monumental organ by Felice Bossi (1843) stands on the counter-facade. The bell tower rises to the right of the facade, where the first side chapel was sacrificed for its construction in 1457.

The octagonal stone tower beside the church is what remains of the marquis's palace. The bell tower, begun in 1457, once ended in a tall octagonal spire of wood covered with metal sheets, which earned Chivasso's residents the nickname facia 'd tola, "tin face", still used today. French cannon fire destroyed the spire during the 1705 siege, and the present bell chamber was built in the 1720s.