![Image: A fisheye view inside the Pantheon of the rotunda, dome, and oculus. - Monolithic Dome Institute Image: A fisheye view inside the Pantheon of the rotunda, dome, and oculus. - Monolithic Dome Institute](https://monolithicdome.com/vault/img/2021/07/28/6100d8023c0d9799bbb98da3/rome-italy-pantheon-oculus-fisheye.huge.jpg)
Image: A fisheye view inside the Pantheon of the rotunda, dome, and oculus. - Monolithic Dome Institute
![The 1900-year-old Pantheon which features the world's largest unreinforced concrete dome. At noon on 21 April (traditional date of birth of Rome), the sun's ray through the oculus would strike the entrance The 1900-year-old Pantheon which features the world's largest unreinforced concrete dome. At noon on 21 April (traditional date of birth of Rome), the sun's ray through the oculus would strike the entrance](https://i.redd.it/1wdfe78okjna1.jpg)
The 1900-year-old Pantheon which features the world's largest unreinforced concrete dome. At noon on 21 April (traditional date of birth of Rome), the sun's ray through the oculus would strike the entrance
![Pantheon Roma on Twitter: "9 metres is the diameter of the #oculus.. and when it rains you can #admire a 9 metres "column" of water falling on the floor of this amazing Pantheon Roma on Twitter: "9 metres is the diameter of the #oculus.. and when it rains you can #admire a 9 metres "column" of water falling on the floor of this amazing](https://pbs.twimg.com/media/EV9OI1EWkAMyW6j.jpg)
Pantheon Roma on Twitter: "9 metres is the diameter of the #oculus.. and when it rains you can #admire a 9 metres "column" of water falling on the floor of this amazing
![9 Things You Need to Know about the Pantheon in Rome | Through Eternity Tours - Through Eternity Tours 9 Things You Need to Know about the Pantheon in Rome | Through Eternity Tours - Through Eternity Tours](https://cms.througheternity.com/upload/CONF83/20200603/pantheon-oculus-rome.jpg)
9 Things You Need to Know about the Pantheon in Rome | Through Eternity Tours - Through Eternity Tours
![Inside the Pantheon in Rome, Italy looking up at the oculus (hole) in the ceiling and it's geometric dome design Stock Photo - Alamy Inside the Pantheon in Rome, Italy looking up at the oculus (hole) in the ceiling and it's geometric dome design Stock Photo - Alamy](https://c8.alamy.com/comp/KKM34J/inside-the-pantheon-in-rome-italy-looking-up-at-the-oculus-hole-in-KKM34J.jpg)