Cageworld series was created in 1982.
T-Series was created in 1971.
Denmark Series was created in 1946.
Millennium series was created in 2005.
The Railway Series was created in 1945.
The Colonial Series was created in 1901.
The Fortress Series was created in 1995.
Fantaghirò series was created in 1991.
The Fey Series was created in 1996.
The Soundboard Series was created in 2001.
Foundation series was created in 1942.
The Radiolarian Series was created in 2009.
Giovio Series was created in 1543.