The national flag of Monaco has two equal horizontal bands, of red and white, both of which have been the heraldic colours of the House of Grimaldi since at least 1339. The present bicolour design was
Monaco team with flag at the 2010 Winter Olympics opening ceremony
Poster for the Exposition De Monaco (1920)
The national flag of Poland consists of two horizontal stripes of equal width, the upper one white and the lower one red. The two colours are defined in the Polish constitution as the national colours
Flag of Monaco
…graphically similar to the flag of Indonesia, with differences in their shades of red and dimension ratios (Monaco's at 4:5 and Indonesia's at 2:3). The flag of Poland is also similar to that of Monaco, but with the colours reversed – white on top and red on the bottom. The flag of Singapore also has a similar design…
Flag without the coat of arms
Flag with the coat of arms
The Polish, Papal (yellow and white) and Municipal (white and blue) flags in Kraków's Grand Square during Pope Benedict XVI's visit to Poland on 27 May 2006
Example of vertical alignment of Polish national colours inside the Sejm chamber