Forcalquier Cathedral, now the Church of Notre-Dame-du-Bourguet, is a former Roman Catholic cathedral, and a national monument of France. Erected in the 12th century as a collegiate church, the cathedral of Forcalquier became a second seat of the Bishop of Sisteron in 1408, and for that reason is referred to as a co-cathedral. The diocese of Sisteron was abolished in 1801, after which the cathedral continued as a parish church.
The nave, the choir, the transept and the cloister date from the early 13th century, representing one of the first examples of Gothic style in southern France. The bell tower is from the 16th century. The church houses a panel of the Triumph of Christ by Pierre Mignard.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.