The Ancient Origins of the Halo
Halos did not begin as a religious symbol. They first appeared in ancient Greek art to represent the divine nature of heroes and rulers, only later becoming a staple of spiritual iconography across world religions.
While we associate the glowing circle with saints, it was originally used to mark secular power and status. As the style spread from the Mediterranean to Asia, it evolved into diverse forms like flickering flames or full-body mandorlas. This visual shortcut allowed ancient artists to instantly signal a character's importance without writing a single word. It remains one of the longest-running artistic traditions in human history.
Source: Halo (religious iconography)