20 Specification drawings (blueprints and lightprints): views, floor plans, cross-sections, detail drawings (banisters, natural stone, interior door, south facade) and natural stone stomata, signed by J.Th.J. Cuypers and P.J.J.M. Cuypers, dated 1936, scale 1 to 1, 1 to 20, 1 to 100.