At first glance, this ancient open-air theater appears quite a bit like a mini-Colosseum. Built during the later years of the Roman Republic, it was built nearly 100 years before the famous Colosseum. Named by the Emperor Augustus in 11 BC after his recently deceased nephew Marcus Claudius Marcellus, the theater may be the oldest surviving of its kind in the world.
The structure’s archways and tiers comprise a semicircular design (unlike the Colosseum, which is completely circular.) The third tier was lost in reconstruction during the Middle Ages, but ornamental Doric and Ionic columns still frame the theater. In its prime the structure could hold more than 15,000 spectators and was one of the most popular entertainment venues in Ancient Rome. Live music and drama performances filled its seats until it was adopted by noble families and luxury apartments (which can still be seen today) were built atop the ruins.