The International Institute of Social History received large parts of the records of the Centrum Partij and the Centrumdemocraten, two right-wing parties that incited considerable action from anti-fascist groups in the 1980s and 1990s. The documents were donated by Hans Janmaat, a well-known Dutch politician who headed the parliamentary election list of the CP in 1981 and 1982. Janmaat represented the party in Parliament in 1982-1984, after which he was expelled from the CP and continued as an independent MP until 1986. In 1984 he founded the CD, whose speaker in Parliament he was from 1989 to 1998. He decided to give the records to the IISH through the mediation of a former co-student, who acts as a caretaker.