Source: Wat Molilokkayaram Ratchawarawihan, Bangkok, Thailand
https://en.wikipedia.org/wiki/Wat_Molilokkayaram
Dao Phedan—literally “Ceiling Star”—is a type of traditional Thai decorative motif created to adorn the upper parts of buildings, such as ceilings and eaves, evoking the appearance of stars in the night sky. Its structure is typically circular, featuring radiating designs that spread outward from a central axis. In some cases, the pattern may take other geometric forms, such as squares, hexagons, or octagons.
