25.07.1899
foundation as Fußballclub Jahn 1899 Siegen (as football section of TV Jahn 1879 Siegen)
__.__.1923
seperation of football section and merger with SV 07 Siegen and renaming to Sportfreunde Siegen von 1899
__.__.1945
forced dissolution after World War II
__.__.1945
new foundation as Sportfreunde Siegen von 1899