On February 23th, 2021, the archives of the International Young Christian Workers (IYCW) were moved from the International Secretariat in Brussels to KADOC Documentation and Research Centre on Religion, Culture and Society connected to the Catholic University of Leuven.

The IYCW has a rich history and pre-history. From its origins in the Young Christian Workers (YCW) (1925) movement, to its official recognition as an international movement in 1957 and beyond, it envisaged the emancipation and education of young workers all over the world. Through the years, the IYCW has produced vast archives containing written correspondence with the national branches and local (Church) authorities, documents on daily governance and activities, information on personnel and finances,… It really reflects the history of more than seventy years of IYCW.