The Pantheon (opens in new tab)

The Pantheon is one of the greatest Roman monuments still standing. First built as a pagan temple by Marcus Agrippa during the reign of Caesar Augustus, it was rebuilt in its current form by Emperor Hadrian in AD 126 after a devastating fire and still stands just under two thousand years later almost exactly as the Romans intended. It’s famous free-standing dome is a marvel of Roman architecture and engineering, and makes it one of Rome’s most popular tourist attractions to this day.In this e...