Flag of Poland the other two. Due to the horizontal bicolor being a relatively simple and widespread flag design, and white and red being the most popular colors used on flags, there are many flags worldwide that are similar or near identical to the flag of Poland despite being unrelated to it. For example, the historical flag of Bohemia, the major historical region of Poland's southern neighbor, the Czech Republic, consists of two horizontal stripes, white on top and red on bottom. Similarly to the flag of Poland, it is of heraldic origin, the coat of arms of Bohemia being "Gules, a lion
Flag of Austria in the reign of Emperor Joseph II, the Austrian, later Austro-Hungarian Navy used a naval ensign ("Marineflagge") based on the red-white-red colours, and augmented with a shield of similar colours. Both of these flags became obsolete with Austria-Hungary's dissolution in 1918, and the newly formed rump state of German Austria adopted the red-white-red triband as its national flag. The Austrian flag has been the main motif of many collector coins. One of the most recent examples is the 20 euro Post War Period coin, issued by the Republic of Austria on 17 September 2003. The obverse of this coin shows