TIL that the Pantheon’s oculus serves as a natural heating and cooling system, this opening allows sunlight to illuminate the interior and helps regulate temperature. The open design also enables rainwater to enter, which drains through a sophisticated floor system

https://www.romeonfoot.com/the-pantheons-oculus-unveiling-what-is-the-purpose-of-the-oculus-in-the-panthe…
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gl4g0w/til_that_the_pantheons_oculus_serves_as_a_natural/