17 December is a milestone date in history for many reasons; on this date in 1790, the Aztec stone calendar (“Sun Stone”) was discovered in Mexico City, Mexico, which greatly influenced the way we view Aztec history. Also on this date in 1770, Ludwig Van Beethoven was baptized and began a life that would produce nine symphonies, 32 piano sonatas, one opera, five piano concertos and numerous chamber works. But entrepreneurs have also played a huge role in major historical milestones.