The CTKL fonds receives its title from Canadan Teollisuusunionistinen Kannatus Liitto, the Finnish organization which translates to the Canadian Industrial Union Support Circle. This organization was the majority shareholder of the Labour Temple at 314 Bay Street in Port Arthur from 1925 to 1972 and was disbanded in 1979. Prior to 1926, the central administration of the CTKL was in Sudbury after which it relocated to Port Arthur.
The CTKL was made up of supporters of industrial unionism who formed associations in their own local communities and observed rules and regulations as established by an executive committee. This executive committee, the Toimeenpanevakomitea (TPK), was comprised of members of the CTKL elected annually from the central administration and from the local associations. This committee managed the affairs of the league and supported industrial unionism through agitation by engaging speakers, supporting workers in their union activities, and through monetary assistance, as well as writing, publishing, and distributing written materials.
Significant cultural and social events at the Labour Temple and at other branches were supported by the CTKL during the peak years of labour organization.
The records contain minutes of meetings, correspondence, financial records, publications, and miscellaneous items. The fonds has been divided into series as follows:
A - Finnish Building Company
B - Hoito Restaurant
C - One Big Union
D - CTKL
E - Industrial Workers of the World
F - Lumber Workers Industrial Union #120
G - Canadian News Service
H - Miscellaneous
