From 59 bronze cannons from 1420-1860, the metal was analyzed by means of atomic absorption spectrometry. Besides the main compounds copper (86-94%) and tin (5-11%), lead (0-1.6%, exceptionally 2-5%), zinc (0-0.2%, exceptionally 0. 2-12%), silver (0.-0.3%) iron (0-0.3%, exceptions 1%,), antimony (0-1.3%), and nickel (0-0.5%) were determined. The Pb/Ag, Pb/Sb,/Ag/Sb, and Fe/Ni ratios were calculated in order to deduce from these the origin of the ores. The results were promising: 250 more cannons from the Heeresgeschichtliche Museum in Vienna were analyzed to enlarge the statistical basis.