What is the oldest national flag in the world?

You might think it's the Japanese flag, created in 701. However, it differs from the Hinomaru flag we know and wasn't officially used for a long time. The Hinomaru flag was actually created in 1870. (As a side note, the Rising Sun Flag, which many of us are familiar with, wasn't a national flag; it was a military flag used by the Army and Navy.) So, what is the oldest national flag? The oldest national flag is the Danish flag, Dannebrog, created in 1219.