The white eagle that appears on some Polish flags is the national coat of arms of Poland. The symbol first appeared on 12th century Polish coins and is still used on flags, publications and merchandise to represent Poland.
The Polish flag consists of two horizontal stripes of equal width, the top stripe being white in color and the bottom stripe being red. A variation of the flag also features the Polish coat of arms on the top half. Officially, a specific set of organizations is required by law to fly each of the two flag designs, but in practice they are used interchangeably.