Perched on top of the hill, La Mothe Castle dominates the village of Arvier. Unfortunately only the four sided tower remains intact, while the ruins of the round tower and the perimeter wall are still visible. From its current appearance, construction of the castle is estimated as being between the end of the 12th and the start of the 13th century, with important modifications in the 15th century. It was first mentioned in 1287, when Aimone de Arverio paid feudal homage to the count of Savoy. According to 18th-century historian Jean-Baptiste De Tillier, the Savoy nobleman Aimar de la Mothe came to Val d’Aosta towards the end of the 13th century and married the heiress of the noble De Arverio family, thus gaining possession of the castle, before restoring it and giving it his own name.References:
Roman Walls of Lugo are an exceptional architectural, archaeological and constructive legacy of Roman engineering, dating from the 3rd and 4th centuries AD. The Walls are built of internal and external stone facings of slate with some granite, with a core filling of a conglomerate of slate slabs and worked stone pieces from Roman buildings, interlocked with lime mortar.
Their total length of 2117 m in the shape of an oblong rectangle occupies an area of 1.68 ha. Their height varies between 8 and 10 m, with a width of 4.2 m, reaching 7 m in some specific points. The walls still contain 85 external towers, 10 gates (five of which are original and five that were opened in modern times), four staircases and two ramps providing access to the walkway along the top of the walls, one of which is internal and the other external. Each tower contained access stairs leading from the intervallum to the wall walk of town wall, of which a total of 21 have been discovered to date.
The defences of Lugo are the most complete and best preserved example of Roman military architecture in the Western Roman Empire.
Despite the renovation work carried out, the walls conserve their original layout and the construction features associated with their defensive purpose, with walls, battlements, towers, fortifications, both modern and original gates and stairways, and a moat.
Since they were built, the walls have defined the layout and growth of the city, which was declared a Historical-Artistic Ensemble in 1973, forming a part of it and becoming an emblematic structure that can be freely accessed to walk along. The local inhabitants and visitors alike have used them as an area for enjoyment and as a part of urban life for centuries.
The fortifications were added to UNESCO"s World Heritage List in late 2000 and are a popular tourist attraction.