96 Circular Meander/Meandros Greek key design

Meanders are common decorative elements in Greek art and Roman art. They appear on many friezes and at the top of some porticos. The design is common in present-day architecture as a neoclassical element. 

Meanders were among the most important symbols in ancient Greece; they, perhaps, symbolized infinity and unity; many ancient Greek temples incorporated the sign of the meander. Greek vases, especially during their Geometric Period, were likely the genesis for the widespread use of meanders; alternately, very ocean-like patterns of waves also appeared in the same format as meandros.