What is pantheon definition?

The Pantheon is a building located in Rome, Italy, and is considered one of the most significant and influential structures of Ancient Rome. Constructed in 125 AD by Emperor Hadrian, it was originally designed as a temple to all the Roman gods and goddesses. The Pantheon is known for its large circular dome, which is considered an architectural masterpiece and was the largest unsupported dome in the world until modern times. The dome has a diameter of 43 meters and is made of concrete, with an oculus, or circular opening, at the top that lets in natural light. Over time, the Pantheon has been used for different purposes, including a church and a tomb for Italian kings. It is now a popular tourist attraction, visited by millions of people each year.