Roma Abbey was built in 1164 by Cistercian monks. The monks established a religious and agricultural centre for the entire Baltic Sea region. After the Reformation in the early 16th century, the monastery was abandoned. It was then under the Danish Crown. The monastery building was partly demolished and the church was used as a stable. In 1645, through the peace treaty in Brömsebro, Gotland became Swedish again.
In 1733, County Governor Johan Dietrich Grönhagen, build a new stately residence, using material from the old monastery in the construction. No major changes have been made since then. It was used as the residence for the County Governor until 1822. Today impressive ruins are well known for the Shakesperian plays that are performed here every summer.
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.