The historical records concerning the earliest period of this territory do not allow us to determine its origins with certainty. In any case, it is believed to date back to around the year 1000, while the first documented evidence dates from 1202. Even the origin of the name is uncertain, though the most widely accepted interpretation suggests that it refers to the original union of three “Villa” (country houses or farms in Roman times), a term which in the medieval period came to mean a small group of buildings.

The village nevertheless passed through history under the Aleramici, the Gonzaga, and the House of Savoy from 1713. Treville occupies a panoramic position and is commonly called “the balcony over the Alps.” On clear days, especially in winter, the view of the snow-capped mountain range is truly remarkable.

The panorama can be admired from the forecourt of the imposing parish church dedicated to Sant’Ambrogio. A powerful 200x telescope is available to the public, allowing even distant landmarks such as the Sanctuary of Oropa and the dome of San Gaudenzio in Novara to be seen.

The church was built in 1772, probably on the ruins of a preexisting castle, and its generous size makes it recognizable from far away. From here begins an important and extremely scenic trail, number 713, marked with the classic CAI red and white signs. The path winds through the Monferrato countryside for about 7 kilometers, taking approximately two and a half hours to complete. This route is part of the “Walking in Monferrato” project.

Of particular interest is the small Church of San Quirico, built in the 12th century. A simple Romanesque gabled structure made of stone blocks with two semicircular apses, it is notable for the numerous carvings and graffiti on the rock made in the medieval period by passing groups of pilgrims.

The village’s unique microclimate allows for the renowned cultivation of artichokes and capers.