Entities
- Dallas University
- Letter from: 5.3.1953, Dallas
- De Young Museum <San Francisco>
- Letter from: 27.1.1950, San Francisco (Calif.)
- Der Anker, Gesellschaft für Lebens- und Rentenversicherung
- Letter from: 19.9.1917, Oberammergau (Germany)
- Letter from: 23.9.1917, Ilipan
- Letter from: 27.9.1917-29.9.1917, Ilipan
- Letter from: 8.10.1917, Oberammergau (Germany)
- Letter from: 11.11.1917, Charlottenburg (Berlin;Germany)
- Letter from: 13.8.1918, Charlottenburg (Berlin;Germany)
- Derwisch-Moschee <Damaskus>
- Letter from: 30.8.1937, Jerusalem
- Detroit University
- Letter from: 19.3.1942, Michigan
- Deutsche Bank
- Letter from: 24.5.1917, Oberammergau (Germany)
- Letter from: 23.7.1917, Oberammergau (Germany)
- Letter from: 7.9.1917, Oberammergau (Germany)
- Letter from: 11.9.1917, Oberammergau (Germany)
- Letter from: 17.9.1917, Oberammergau (Germany)
- Letter from: 6.4.1918, Charlottenburg (Berlin;Germany)
- Letter from: 14.11.1931, Ascona (Switzerland)
- Deutsche Vaterlands-Partei
- Letter from: 1.12.1917, Charlottenburg (Berlin;Germany)
- Letter from: 8.4.1918, Charlottenburg (Berlin;Germany)
- Deutsche Werkstätten <München>
- Letter from: 25.4.1917-7.5.1917, Berlin und Oberammergau (Germany)
- Deutscher Werkbund
- Letter from: 23.10.1914, München
- Letter from: 30.7.1915, Charlottenburg
- Letter from: 5.11.1917, Charlottenburg (Berlin;Germany)
- Letter from: 8.7.1928, Charlottenburg
- Deutsches Rotes Kreuz
- Letter from: 10.8.1914, Garmisch-Partenkirchen (Germany)
- Letter from: 22.9.1914, Dresden (Germany)
- Dolomitenhof <Seis am Schlern>
- Letter from: 15.7.1913, Munich (Germany)
- Letter from: 21.7.1913, Siusi (Italy)
- Letter from: 26.7.1913, Siusi (Italy)
- Dominion-Hotel <Avignon>
- Letter from: 14.1.1929, Avignon (France)
- Douglas Aircraft Company <Long Beach, Calif.>
- Letter from: 3.6.1952, Maui (Hawaii)
- Duke University <Atlanta, Georgia>
- Letter from: 7.1.1945, Chattanooga
- Duke University <Durham, North Carolina>
- Letter from: 11.1.1945, Atlanta
- Durrants Hôtel <London>
- Letter from: 27.10.1935, Jerusalem
- Dutch Batavia Line
- Letter from: 12.8.1936, Salzburg (Austria)