Basilica of Maxentius
Via dei Fori Imperiali
Rome Italy
2016

https://en.wikipedia.org/wiki/Basilica_of_Maxentius

The Basilica of Maxentius and Constantine, sometimes known as the Basilica Nova—meaning "new basilica"—or Basilica of Maxentius, is an ancient building in the Roman Forum, Rome, Italy. It was the largest building in the Forum, and the last Roman basilica built in the city.

https://en.wikipedia.org/wiki/Colosseum

Remaining nave of a Roman basilica that once housed a colossal statue of Emperor Constantine.

The Colosseum is an elliptical amphitheatre in the centre of the city of Rome, Italy, just east of the Roman Forum. It is the largest ancient amphitheatre ever built, and is still the largest standing amphitheatre in the world, despite its age.