Jakob Hyrtl (November 23, 1799 - October 17, 1868), sometimes as Jakub Hyrtl, Jacob Hyrtl, Jacob A. F. Hyrtl, or Jakab Hyrtl, was a Viennese engraver, illustrator, and printmaker. He produced a wide range of works, including maps and book plates, and was especially adept at renderings of buildings and cityscapes. However, Hyrtl is best known for giving to his brother, the anatomist Joseph Hyrtl (1810 - 1894), a skull which Jakob claimed to be the skull of composer Wolfgang Amadus Mozart (1756 - 1791). Joseph examined the skull and then donated it to the City of Salzburg, where Mozart was born and resided for much of his life; it is now held by the Mozarteum (incidentally, much of the rest of Joseph Hyrtl's extensive collection of skulls was donated to the Mütter Museum in Philadelphia).