This collection is not an archive of S. de Clerq but a collection of drawings and other documents of various origins:

* the documents concerning buildings in Amsterdam, Doorn and Bilthoven (request numbers r1., r2. and r3.) were acquired before 1976, this acquisition is not documented.

* the documents relating to the country house in Wassenaar (application number pf1.) were donated in 1992 by the architectural firm LIAG in The Hague.

* the documents concerning the building of "de Centrale" in The Hague (request number pf2.) are duplicates from the archives of "de Centrale" acquired from the Insurance Company Reaal and from the International Institute of Social History in Amsterdam.

For De Clerq, see also archive Gratama, code GRAT panel 1-11

The inventory was editorially revised in 2005.