Richard I of England

Louis IX of France

Frederick II, Holy Roman Emperor

Edward I of England

Second Crusade:

Frederick Barbarossa, Holy Roman Emperor

Philip II Augustus of France

Third Crusade:

Louis VII of France

Ninth Crusade:

Conrad III of Germany

Crusader Kings is a term referring to several medieval European kings who took part in the Crusades, most notably the Third Crusade (which for this reason is sometimes called the "King's Crusade"). Among the Crusader Kings are:

Fifth Crusade and Sixth Crusade:

Seventh Crusade and Eighth Crusade:

The term can also refer to the Kings of Jerusalem and to Kings of Cyprus.

Crusader Kings is also a strategy game by Paradox Interactive.