Otto Koenigsberger. Deutsches Turnund Sportabzeichen certification, 1926.

Otto Koenigsberger. Practical Training Record, notebook, 1927

Otto Koenigsberger. Secondary School Certificates, February 1927.

Otto Koenigsberger. Summer House for Maas family, 1927

Otto Koenigsberger. Testimonials and related documents, AEG, 1928-1929

Otto Koenigsberger. Figure and animal studies, 1927-1929

Otto Koenigsberger. Letter of recomendation for Otto Koenigberger from Bauingenieur-Buro G. Mensch, 1929.

Otto Koenigsberger. Belegbuch, Technische Hochschule, Berlin, 1927-1929

Otto Koenigsberger. Boathouse, 1929

Otto Koenigsberger. Letter of recomendation for Otto Koenigberger from Bauingenieur-Buro G. Mensch, 1929

Decorative Panel for October

'Decorative Panel for August'

Decorative Panel for September

Decorative Panel for September

Otto Koenigsberger. Unidentified house, c1930

Otto Koenigsberger. Extension to Summer House for Maas family, 1930

Otto Koenigsberger. Official note certifying award of the medal for 'Rettung Aus Gefahr' to Otto Koenigsberger, 1930.

Decorative Panel for November

Decorative Panel for December

Decorative Panel for August

Decorative Panel for June

In Doubt colour engraving from a painting

Decorative Panel for July

Otto Koenigsberger. Small Country House near Berlin, c1930

Otto Koenigsberger. Berlin Technische Honchschule medals, c1931

Otto Koenigsberger. Justice Ministry Building: competition entry, c1931

Decorative Panel for March

Decorative Panel for January

Otto Koenigsberger. Diploma Project: Zoological Garden, 1931

Otto Koenigsberger. Land Development Plan, Wedding, Berlin, 1930-1931