This house sign in Graz shows a bird standing on a combination of a star and a crescent. The combination of star and crescent was already known in the Hellenistic period (4th–1st centuries BCE). The crescent represents the moon, and the star represents the sun or the morning star. [German]
The crescent offers an interesting detail: it shows a face. A crescent with a face is a rare combination you see sometimes in coat of arms.
Sources / More info
- Star and crescent (Wikipedia