Porte du Scex Castle was originally built to protect the territory of Vouvre and collect tolls. In the Middle Ages it was owned by Savoy and Tavelli de la Tour families. The castle was rebuilt between 1591 and 1609 and again in 1678. The museum opened in the Porte-du-Scex castle in 2008. It houses an interactive and in 3D model of the Chablais region, that is part of the permanent collection. Other rooms are dedicated to temporary exhibitions concerning the history and cultural heritage of the region, and which change every two years.
The Amphitheatre of the Three Gauls was part of the federal sanctuary of the three Gauls dedicated to the cult of Rome and Augustus celebrated by the 60 Gallic tribes when they gathered at Lugdunum (Lyon). The amphitheatre was built at the foot of the La Croix-Rousse hill at what was then the confluence of the Rhône and Saône.
Excavations have revealed a basement of three elliptical walls linked by cross-walls and a channel surrounding the oval central arena. The arena was slightly sloped, with the building"s south part supported by a now-vanished vault. The arena"s dimensions are 67,6m by 42m. This phase of the amphitheatre housed games which accompanied the imperial cult, with its low capacity (1,800 seats) being enough for delegations from the 60 Gallic tribes.
The amphitheatre was expanded at the start of the 2nd century. Two galleries were added around the old amphitheatre, raising its width from 25 metres to 105 metres and its capacity to about 20,000 seats. In so doing it made it a building open to the whole population of Lugdunum and its environs.