The colors blue, white and gold were always related with Galicia.

The chalice, with a silver host, and the golden crosses on blue background have been its symbol since medieval times (13th century).

For some time it was thought that it was based on the flag of the maritime province of Corunna, but today it is known that the design is earlier.

[1] Originally, the flag for the maritime province of A Coruña was a blue St Andrew's Cross over a white field – St Andrew is one of the most popular saints in Galicia, where 72 parishes are devoted to him.

The flag of Galicia is white, with a blue diagonal band which crosses it from the top left-hand corner to the bottom-right.The law of symbols of Galicia (29 May 1984) regulates the official colours, proportions and uses of the Galician symbols.