The industrial history of Alingsås began in 1724 when Jonas Alström established there a factory. The factory had 1,000 employees already in the mid-18th century. The Alströmerska warehouse at the Lilla Torget is the city’s oldest secular building. It was built in the beginning of the 1730s and is the only property left from the Alströmerska époque. The building was first used by Jonas Alströmer to house materials used in manufacturing. In 1928 the museum took over the building and at first shared it with the library that is now located next door.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.