sound hole

It has an f-style body with scroll and f-holes, an asymmetrical Epi peg-head.

But by far the most famous (or infamous) nude to come out of this volatile period was Man Ray's surrealistic portrait "Le Violon d'Ingres," in which he playfully transformed the graceful nude back of his mistress into a human violin with inked-in F-holes.

The number PHI, Langdon told them, was even used by Stradivarius to calculate the exact placement of the f-holes in the construction of his famous violins.

Music composed by Mozart, Beethoven and Bach embraced the equation, and Stradivari used the code to place f-holes in his famous violins.

The f-holes at the front of the instrument are also important as they allow the front of the violin to vibrate freely - it would not work without them.