It all depends on what you mean by "most historical." The oldest flag that is today a Naional Flag is that of Denmark. Germany has probably had the most historical debates surrounding its flag especially during the 1840's and 1920's. The flag of the USA has probably had more historical books written about it.
You'll want to fly the most recent version of the American flag on top. You can then fly the historical version below and normally etiquette will say to fly a smaller size for that historical one. The 50 Star American flag should always be the most prominent.
Your local library will have many books on the history of Nazism and the origins of the Nazi flag. In addition, you can also find historical DVDs to visually represent the history of the Nazi flag.
No, there is not a historical connection
Oregon's flag is the only flag with different images on each side. front says state of Oregon 1859. back side has a beaver.
Romania
It is the flag of Europe!
the empty flag.
If you planted your flag, then that country owned it. This was how people would take over new lands.
Don't understand your question? What flag are you referring to? Most courts display one or at the most two, flags. The state flag and the US flag.
The red colour in the upper left corner of the Australian flag is the Union Jack, this denotes Australia's historical links with Britain.
Koru Flag
The Flag of New Brunswick has a ship on its provincial flag. Shipping is an important industry on the New Brunswick.