A magnificent temple to all of the gods, the Roman Pantheon has stood on its site on the Campus Martius for almost 2,000 years. It was an architectural marvel well ahead of its time, most noticeable in its massive concrete dome.

The inscription declares that it was built by Marcus Agrippa, who built the original Pantheon in 27 BC. In fact, that building was lost to fire, and Hadrian built this version around 125 AD. It has stood ever since.