Collegiata di San Martino, Collegiate church in Cerreto Sannita, Italy.

The Collegiata di San Martino is a large parish church in Cerreto Sannita with a broad facade and a striking external staircase that splits into four branches. The layout spreads across several hundred square meters and creates a spacious interior space with tall walls.

First documented in a diploma of 22 April 972 kept at the Sannio Museum in Benevento, San Martino was one of six parishes of ancient Cerreto. On 22 February 1544 Bishop Alberico Giaquinto, with Count Diomede III Carafa and the universitas, raised it to a collegiate church with eleven canons and the archpriest, suppressing the other five parishes. Razed by the earthquake of 5 June 1688, it was rebuilt at the centre of the new town planned by Count Marzio Carafa and his brother Marino.

The interior holds 18th-century paintings, wooden statues, and polychrome marble altars that fill the space with religious art. These works reflect how much the community valued this church over the centuries.

You enter through the distinctive external staircase, which offers multiple paths to the entrance. The interior is spacious and easy to walk through, with good light in the main areas.

The church holds 2,000 m² of floor space, measures 58.5 m long, 32.4 m wide and 25 m high, making it the largest church in the diocese of Cerreto Sannita-Telese-Sant'Agata de' Goti. Inside are 18th-century paintings, wooden statues, old Cerretese ceramic floors and a 19th-century organ in a Baroque case.