1796 - Carl Friedrich Gauss, German mathematician, discovers the construction of the
heptadecagon. 1856 - Russia signs the Treaty of Paris, ending the Crimean War.
In 1796, however, a young German mathematician, Carl Friedrich Gauss (1777-1855), worked out a method for constructing a
heptadecagon (a polygon built up of seventeen sides of equal lengths and sometimes called a seventeengon in consequence), using a compass and straightedge only.