Русское географическое общество
The Constantine Medal was a gold medal worth 200 silver roubles and was the highest award of the Imperial Russian Geographical Society. It was established and named after the Society’s first chairman, Great Duke Constantine and was awarded from 1849 to 1929 to explorers who had made a significant geographical discovery or to authors of outstanding publications in geography, ethnography or Russian statistics. From 1924 to 1929 the Medal was referred to as “The highest award of the Russian Geographical Society”.