Leptis Magna Arch of Septimus Severus. The sands of time have preserved the Roman city of Leptis Magna, an ancient seaport in what is now Libya. It is one of the best preserved Roman cities in the Mediterranean.
The Pula Arena in Pula, Croatia is the only remaining Roman amphitheatre to have four side towers and with all three Roman architectural orders entirely preserved. It is among the six largest surviving Roman arenas in the World.
The Arch of Septimius Severus in the ancient city of Leptis Magna - Libya - early century AD - note the broken pediment - this is highly innovative and rare in Roman architecture of the period. Example of the Composite order of architecture.