Flag of Alabama
The flag of Alabama was adopted by the Alabama state legislature on February 16, 1895.
It's believed that the crimson saltire of the Flag of Alabama was designed to look like the blue saltire of the Confederate Battle Flag. The Battle Flag was square-shaped, and Alabama's flag is sometimes shown as a square. The authors of a 1917 article in National Geographic expressed their opinion that because the Alabama flag was based on the Battle Flag, it should be square. In 1987, Don Siegelman issued an opinion in which the Battle Flag derivation is repeated, but concluded that the proper shape is rectangular, as it had been depicted numerous times in official publications and reproductions.
However, the saltire design of the Alabama state flag also looks like several other flags. It is identical to the flag of St. Patrick, incorporated into the Union Flag of the United Kingdom to represent the union of the Kingdom of Great Britain with the Kingdom of Ireland. This has led to other origins being put forth as possibilities.