It is strange that we don’t track down a lot of old documentation on the structure notwithstanding its verifiable significance. Truth be told, the main composed report from the time is from Dio Cassius who thought the structure was built by its unique planner, M. Agrippa. He alluded to the structure as a sanctuary of numerous divine beings. “A rectangular forecourt toward the north given the conventional methodology, its long corridors making the block rotunda, so prominent today, show up less overwhelming; a tall, octastyle pedimented patio on a high platform with marble steps likewise made the impression of a customary Roman sanctuary.” The structure’s southern openness would uncover to a passerby the Baths of Agrippa, toward the east untruth the Saepta Julia, and toward the west the Baths of Nero.

The Pantheon is fundamentally made out of a segmented patio and barrel shaped space, called a cella, covered by a vault. Some would contend that the cella is the most fundamental part of the Pantheon, while the yard is just present to give the structure a façade. “Between these is a momentary rectangular design, which contains a couple of huge specialties flanking the bronze entryways. These specialties likely housed the sculptures of Augustus and Agrippa and furnished a devout and political relationship with the first Pantheon.” Once inside the vault, an admirer would end up in a superbly huge space enlightened exclusively by an enormous oculus fixated on the roof. The walls of the chamber are accentuated with eight profound breaks shifting back and forth among half circle and rectangular in shape. At the south finish of the inside is the most intricate break total with a barrel-vaulted entrance. “The six basic breaks are separated from the chamber by sets of marble segments, while aediculae (little pedimented places of worship) raised on tall podia project before the bending wall between the breaks.” Encircling the whole room simply over the breaks is an intricate traditionally styled entablature. The upper part of the vault was designed too, however what remains is generally from an eighteenth century rebuilding. “The first enhancement of the upper zone was a line of firmly divided, slight porphyry pilasters on a constant white marble plinth.” The vault floor is designed in a checkerboard example of squares and circles inside squares. The tiles are made of porphyry, marbles, and stones while the circles are made of overlaid bronze.