The Leonhard Euler Gold Medal (Золотая медаль имени Леонарда Эйлера) is a medal named after the Swiss, German, and Russian mathematician Leonhard Euler, awarded by the Отделением математических наук (Branch of Mathematical Sciences of the Russian Academy of Sciences) for outstanding results in mathematics and physics. The medal was awarded once in 1957 to two scientists and since 1991 has been awarded every five years.[1]