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 by the Austrian capital Vienna from the late 13th century onwards. Since the days of Rudolph of Habsburg and the 1283 Treaty of Rheinfelden, the combination of red-white-red was widely considered to be the Austrian (later also Inner Austrian) colours used by the ruling Habsburg dynasty. However, the "national flag" (in a modern sense) of the Austrian Habsburg Monarchy, like the later Austrian Empire and the Cisleithanian part of Austria-Hungary until 1918, was black-yellow. These were the family colours of the Imperial House of Habsburg, and were themselves in part derived from the banner of the Holy Roman Empire. Beginning