It was completed sometime in 125 AD under the Emperor Hadrian and was built atop an older structure (27BC) by Marcus Agrippa, Augustus Caesar’s son-in-law and military commander. Hadrian honoured Agrippa by placing this inscription on the frieze of the portico – M*AGRIPPA*L*F*COS*TERTIUM*FECIT.
The interior design is dominated by squares and circles. The floor has a checkerboard pattern, while the ceiling is adorned with concentric circles of squares. Directly underneath the dome are niches which at one time may have contained the statues of gods.
Then one sees the columns, the high altar and the apses. In addition there are three niches and three chapels. King Victor Emmanuel II is buried in the second chapel and Raphael, the painter is buried in the third niche near the third chapel.
Reading accounts of travellers to Rome modern and from long ago, it becomes apparent that the sight of the Pantheon has been and will continue to be an awe-inspiring sight! And as if to underline it's uniqueness, even in this city of mind-blowing sights, it can be seen easily in any panoramic view of the city, resembling an upside down chinese bowl, unique in this city of domes.