This category houses all project files for which the date is known. The project descriptions are arranged chronologically.
This category also contains project files of projects designed by Knijtijzer before he started his own office in 1946, such as documents concerning study activities and competition designs. In the period between ca. 1938 and 1946 he also worked on some small commissions such as designing furniture, tombstones, furnishings and renovations. These commissions, with or without a work number, he received in addition to his work as a draftsman at the various architectural firms or during the war period.