The Collegiata di Castell'Arquato, also known as the Collegiata di Santa Maria, located in the Castell'Arquato, province of Piacenza, in Emilia-Romagna, Italy.
A church was built at the site by 756, however, the building was rebuilt after the earthquake of 1117, and consecrated in 1122. The church facade was completed in the 15th-century; the bell-tower in the 13th-century. The Palazzo Pretorio adjacent to the church was built in 1293. Further reconstructions and additions occurred in 18th and 19th centuries.
In 1899, the 15th-century frescoes were discovered in the Chapel of Santa Caterina. A few decades later, the 8th-century baptismal immersion font came to light. The interior walls of this chapel have frescoes by unknown Tuscan painters, depicting the Passion of Christ, and the Death and Glory of the Virgin.
The chapel of St Joseph, built in 1630, was decorated by frescoes by Giacomo Guidotti.