Photos

This is a shot taken inside the Pantheon.
I did some post processing to adjust the colours. In the WS there is the original shot. I do not which shot I prefer.

The Pantheon is a building in Rome which was originally built as a temple to the seven deities of the seven planets in the Roman state religion, but which has been a Christian church since the 7th century. It is the best-preserved of all Roman buildings and the oldest important building in the world with its original roof intact. It has been in continuous use throughout its history.

The building is circular under a pediment opening into the rotunda, under a coffered, concrete dome, with a central opening (oculus), the Great Eye, open to the sky.
The height to the oculus and the diameter of the interior circle are the same (43 metres), so the whole interior would fit exactly within a cube (alternatively, the interior could house a sphere 43 metres in diameter). The dome is the largest surviving from antiquity and was the largest dome in western Europe until Brunelleschi's dome of the Duomo of Florence was completed in 1436.

****From WIKIPEDIA****