Fontana dei delfini, Heritage fountain in Piazza San Martino, Cerreto Sannita, Italy.

Fontana dei delfini is a fountain made of limestone and lava stone in Piazza San Martino, featuring four dolphins spouting water around a central pine cone ornament. The structure combines original and reconstructed components into a single unified composition.

In 1812 the Cerreto Sannita municipal administration bought the lava-stone parts of the fountain, the four dolphins and the central pine cone, in Naples. The limestone sections were added in 1813, when the decurionato assigned mason Biagio Ciccarelli the works "per la riforma della fontana di S. Martino". It first stood in the northern part of Piazza San Martino and was moved to the southern side in the first half of the 20th century to make room for the town's first war memorial.

The fountain is also called "di Masaniello". According to Liliana de Curtis, daughter of actor Totò, this is the fountain where Masaniello gave his speeches in 17th-century Naples, in Piazza del Mercato. The claim links the Cerreto fountain to that Neapolitan episode.

The fountain is located in the southern section of Piazza San Martino and is easy to reach when exploring the historic center on foot. The plaza itself is open and free of traffic, making it a comfortable spot to linger and observe the surroundings.

According to Liliana de Curtis, daughter of actor Totò, this is the fountain where Masaniello gave his speeches in 17th-century Naples, in Piazza del Mercato. The claim ties a Cerreto Sannita landmark to one of Naples' best-known popular revolts.