Various discoveries have been made in the area, such as cinerary urns belonging to a necropolis, thus supporting the theory of a probable prehistoric origin of the village.

[4] Around 200 BC, the Roman Empire, engaged in the conquest of the Ligurian region, built a small village on the site, called Lucus Bormani, originally dedicated to the god Bormo or Bormano.

According to some sources, basic Christian education was provided around the 1st century by the saints Nazarius and Celsus, to whom the Dianese population later dedicated a small church near the sports field.

In 1199, the Communitas Diani was established, merging several settlements of the Diano valley, and in 1228 it became an integral part of the Republic of Genoa.

This lucrative trade had to contend with increasingly frequent pirate raids, forcing the Genoese senate to erect fortifications and watchtowers along the territory, with the substantial help of the local population.

[5] The earthquake and subsequent tsunami of 23 February 1887 caused considerable structural damage to houses and monuments, and the loss of several lives;[4] the Piedmontese engineer Giacomo Pisani is responsible for the design of the new town plan following the disaster.