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Emperor Wilhelm II, the infamous "Kaiser" of World War I, spent a month each year at Bad Homburg, the principal city of the Taunus Hills. Another frequent visitor to Bad Homburg was Britain's Prince of Wales, later King Edward VII, who made the name Homburg world famous by associating it with a hat.
Frankfurt was rebuilt after World War II with little attention paid to the past. Nevertheless, important historical monuments can still be found...