The Vigna Cassia catacombs located next to thel Parco Archeologico Neapolis, owe their name to the family that owned the vineyard (at the time of discovery), which was located above the catacombs themselves.
They were found in 1852 during excavations by the Commission of Antiquities and Fine Arts, which at the discovery of steps carved into the rock that led to about 15 meters below street level, decided to deepen the research. After the excavations they discovered that the steps continued to a depth of 25 metres and that they led to the beginning of a series of tunnels.
The Catacombs of Vigna Cassia are considered the largest in Sicily, the beginning of their construction dates back to the third century AD, were active from the second half of the fourth century AD and presented themselves as a real cemetery consisting of a ipogeo of communities, but also five private hypogeums (intended for individual burials).
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.