Hat on!

The first German edition of Joseph Sperl's “Handbüchelein der Papierfaltekunst” ("Small Handbook of  the Art of Paper Folding") was published in 1904. The 150 models presented included five hats and a tiara. The last German publication I know of on origami hats was published in June 2000 by Joan Sallas under the title “Hut auf!” ("Hat on!"), with 30 funny hats and two tiaras. The variety in this book is unsurpassable. Nevertheless, I also tried my hand at this subject...