Hadrian’s 2,000-Year-Old Solar Trick: The Pantheon Oculus Lights Up Rome’s Birthday at Noon Every April 21
Every April 21 at midday, a beam of daylight descends by way of the oculus of the Pantheon and strikes the monument’s bronze entrance doorways — a phenomenon that has occurred with out interruption for practically 2,000 years and that students say was no accident of structure. The alignment falls on Natale di Roma, the…