I don't know if it's obtainable yet, but the description for the furnishing called Copy of "Judgment Day" says this:
Furnishing: This painstakingly crafted painting depicts the fiery conflict between Odin, the Dark Rider and Alexander, the Iron Giant.
Alexander is referred to as the Iron Colossus in many cutscenes. He's never called an Iron Giant. Iron Giants are the ironclad robots in Abyssea and Legion.
Also, the epithets should be punctuacted "...Odin, the Dark Rider, and Alexander, the Iron Colossus." There's a comma missing after the word "Rider".