Stargate Pantheon, Rome
Almost two thousand years after it was built, the Pantheon’s dome is still the world’s largest unreinforced concrete dome. The height to the Oculus and the diameter of the interior circle are the same, 43.3 metres (142 ft). A rectangular structure links the portico with the rotunda. It is one of the best preserved of all Roman buildings.
This reminds me of the target to shoot at on The Death Star in Star Wars.
(No tripod, naturally, and 3 exposures HDR)