This dome was built as a temple for the Roman Gods and since the 17th century it is used as a Roman Catholic Church. The concrete dome at the top of the temple has a central opening called the Oculus.
04. Peter’s Basilica
This is the most magnificent dome one of the Christian world. Known as the world’s tallest dome, this one rises to 136.57 meters in height, measuring from the basilica’s floor to the external cross’ top.