Church of Santa María a Real do Sar was built in the 12th century on the outskirts of the city. Interesting elements on the exterior are the small tower on the façade and the sturdy flying buttresses built between the 17th and 18th centuries. It has a basilical floor plan with three naves, separated by composite pillars decorated with plant motifs. It is covered with barrel vaults reinforced by rib arches. The sanctuary of the collegiate church has three apses; the central one is polygonal and the two side ones are semicircular. The interior lighting comes from the side openings and the rose window on the façade. Elements worth noting in the cloister include the decoration on the capitals, made by the workshop of Master Mateo.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.