At 866 metres high and just 7 kilometres from Aosta, among the vineyards and orchards, with a beautiful, panoramic view over the city of Aosta, Mount Emilius and the Grand Combin, Roisan was already known in Roman times. It belonged to two noble families: the Rhins, the head of the family being the Bishop of Aosta, and the Quart family.
Livestock and agriculture, encouraged by the particularly sunny position, have become an important source of income for many years in the economy of the town.
Just outside the town you can see the unmistakable, 70 metre long Porossan aqueduct that includes the waters of the Buthier River until it arrives to irrigating the extensive fields around Saint-Christophe and Quart.
The parish church of San Vittore (XV century) holds a certain historical-artistic interest. Inside, it preserves rather valuable wooden statues representing St. Victor and the two Madonnas with Child (XIII and XIV century), while outside you can see an important, Romanesque bell-tower on two levels with a mullioned window.
In Plan Raud, upstream of the chief town, you arrive to a fabulous, rock training area specifically equipped for sporting climbs. There is a fairly picturesque excursion up the hill and Becca di Viou (2,855 m) which is one of the most panoramic points of all Valle d’Aosta, with a view from the Alpi Graie to the Alpi Pennine.
From a historical point of view there is also an excursion to the Rovon Alps (1,743 m) whose route takes in the ancient oratory of Meana.