Before revision: Mars is represented by a spear.ref name=imss> A diagram in the 12th-century Compendium of Astrology by Johannes Kamateros represents Mars by a shield crossed by a spear.</ref> </ref> The modern sun symbol, pictured as a circle with a dot (☉), first appeared in the Renaissance.
After revision: Mars is represented by a spear.ref name=imss> A diagram in the 12th-century Compendium of Astrology by Johannes Kamateros represents Mars by a shield crossed by a spear. </ref> The modern sun symbol, pictured as a circle with a dot (☉), first appeared in the Renaissance.