The Roman theatre is a Roman ancient structure in Lyon built on the hill of Fourvière, which is located in the center of the Roman city.
The theatre was built in two steps: around 15 BC, a theatre with a 90 m diameter was built next to the hill. At the beginning of the 2nd century, the final construction added a last place for the audience. The diameter is 108 m, and there were seats for 10,000 people.
Having been well restored in the early twentieth century, the Grand Roman Theatre of Lyon is one of the oldest structures of its kind and a reminder of Lugdunum, the Gallo-Roman city which would become Lyon. The site was generally abandoned by the third century AD.
Behind the theatre are further ruins, possibly the remains of the Temple of Cybele. The Grand Roman Theatre of Lyon is now used for performances. It is part of the UNESCO World Heritage site of Lyon.
Nowadays, the theatre is primarily a tourist site, but it is still used as a cultural venue. Each year, the Nuits de Fourvière festival takes place in the theatre.
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.