Colosseum

The Colosseum (コロッセオ) or Coliseum, also known as the Flavian Amphitheater, is a location featured primarily in Battle Tendency and Vento Aureo. It is a large ellipsoid arena or built during the  and one of the most famous examples of its kind.

The Colosseum is notable for being the general location where the Pillar Men slumbered until their awakening in 1938. It is also where Team Bucciarati meets with a mysterious ally who wishes to reveal the Arrow's hidden potential to them.

Summary
The Colosseum is one of Rome's most famous landmarks, as well as a recurring place of interest in the JoJo's Bizarre Adventure series. It is a large oval amphitheater that the Roman Emperor,, and his successor , had built in honor of their. Thus, it was named the 'Flavian Amphitheater'. It was a marvel of architecture and engineering, as it was able to welcome at least 50,000 spectators. Many spectacles were organized here, from gladiator fights to executions, and (naval battles after they flooded the arena). It was abandoned and it fell to ruin over time because of earthquakes and the locals robbing the stones. Nowadays, it's mostly a tourist attraction.

Mouth of Truth
In Battle Tendency, it is revealed that there is a large cavern underneath the Colosseum where the Pillar Men slumbered. The cavern itself is decorated with strange Roman statues and murals but also has a working system. The cavern entrance can be found behind a large marble mask referred to as the (The Mouth of Truth) located at the  church.

Creation and Development
Hirohiko Araki has visited the Colosseum on numerous occasions, feeling a strong emotion every time saying "Be it a happy or a sad day, whether the weather is clear or rainy, whether a war or a crisis happens, whether a young couple or Audrey Hepburn go visit it, the Colosseum has remained for many years. This longevity simply gives me courage."

GioGio's Bizarre Adventure
The Colosseum appears as a stage in GioGio's Bizarre Adventure. The front of the Colosseum appears in Chapter 10-3 of Super Story Mode, serving as the backdrop of the duel between Bruno Bucciarati and Secco. Chapter 11-1 and 11-2 of Super Story Mode take place inside the Colosseum, where both the battle between Jean Pierre Polnareff and Diavolo and Bucciarati's fight with Chariot Requiem take place.