Monaco Flag
 
Flag Description:
two equal horizontal bands of red (top) and white; the colors are those of the ruling House of Grimaldi and have been in use since 1339, making the flag one of the world's oldest national banners similar to the flag of Indonesia which is longer and the flag of Poland which is white (top) and red
note: similar to the flag of Indonesia which is longer and the flag of Poland which is white (top) and red

 

 

 

 

Source: CIA The World Factbook