In Jain iconography, the circles (halo or prabha) around a Tirthankar’s head symbolize spiritual radiance and supreme knowledge. They indicate that the Tirthankar has attained kevala-jnana (omniscient, perfect knowledge) and is free from worldly passions. The exact styling of the prabha can vary between Digambar and Śvetambar representations, but the core meaning—divine illumination and enlightenment—remains the same.