Friedrich the simple-minded

Frederick the Simple stands for the following people:

• Frederick the Simple (around 1341-1377), King of Sicily and Duke of Athens and Neopatria, see Friedrich III. (Sicily)
• Friedrich the Simple One (1384? –1440), Margrave of Meißen and Landgrave of Thuringia, see Friedrich IV. (Meißen and Thuringia)

This is a disambiguation page for differentiating between several terms identified with the same word.