The oldest monument of Boulogne-sur-Mer was built in three stages, in the 12th, 13th and 18th centuries. In fact, this belfry was originally a seigniorial prison, transferred to the community in 1230. 38 years later, Saint-Louis ordered the destruction of the tower’s second floor, as well as of the community’s charter of freedom and the town’s seal, as it was refusing to pay a tax on the eighth crusade. One year later, the town, its privileges restored, was able to rebuild the missing part. As for the last octagonal level, it was built in 1734, after the spire was burnt.
Today the belfry is one of 56 in northeastern France and Belgium with shared UNESCO World Heritage Site status and serves as the home to a museum of Celtic remains from the Roman occupation.References:
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.