Danish Mathematical Society was created in 1873.
Danish Astronautical Society was created in 1949.
Danish Society for Nature Conservation was created in 1911.
Royal Danish Horticultural Society's Garden was created in 1882.
Mathematical Society of Japan was created in 1877.
Portuguese Mathematical Society was created in 1940.
Hellenic Mathematical Society was created in 1918.
Swiss Mathematical Society was created in 1910.
Kharkov Mathematical Society was created in 1879.
Edinburgh Mathematical Society was created in 1883.
European Mathematical Society was created in 1990.
Norwegian Mathematical Society was created in 1918.
German Mathematical Society was created in 1890.