True icebergs are galcier fragments that have fallen into the sea. Glaciers are made of compacted smow, which is fresh water. Additionally, “sea ice” that forms from the freezing of sea water is also basically fresh water as well. This is because when saltwater freezes, it excludes salt from the ice crystal lattice.
The four kings, for example, are based on real rulers: the king of diamonds represents the wealthy Julius Caesar; the king of clubs is the brutal Alexander the Great; the king of spades represents the strong but kind David of Israel; and the king of Hearts represents the emotionally disturbed Charles VII of France.