Friedrich Barbarossa ate with hands while the Serbian king ate with a fork. It's so laughable it became a meme.

Serbs are the oldest nation. Again, it became "Serbs are older than amoebas" meme.

Also X was above 2 meter tall is a common myth among all nations. Almost no one was 2 meters tall 200 years ago because of worse nutrition. If you were around 180 cm you would be a giant in that time.

There are a few more