The Pantheon's oculus lets in rain for perfect sound
The Pantheon's open oculus not only illuminates its interior but also, along with its dome, creates surprisingly perfect acoustics through ancient Roman engineering.
Rome's Pantheon, built between 118 and 125 AD, features a massive concrete dome with an 8.7-meter oculus, an open skylight. This opening allows natural light and even rain to enter, a deliberate design choice that integrates the building with nature. Ancient drainage systems on the sloped floor prevent flooding.
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