The original documents of Columbus’ expedition describe a banner, white with a green cross and the crowned initials F and Y, which stood for Fernando and Ysabel, the Catholic Monarchs. It is known that it was a Captain’s Ensign (“La Capitana”). It was used to distinguish the ships under Columbus’ command. It was not a personal, private flag belonging to him, but a sign of the fleet under his authority. The symbols the flag contains (the crowned F and the crowned Y separated by a cross) are engraved in what is claimed to be Columbus’ burial mound in the Cathedral of Seville, but no flag shape is described.