Entities
- R.S.V.P. [Schuhhersteller?]
- Letter from: 29.11.1945 + 14.12.1945, Croton-on-Hudson (N.Y.)
- Rabbinical Union College
- Letter from: 9.11.1947, Washington
- Railway Station <Chicago>
- Letter from: 20.3.1944, Detroit
- Raymond & Raymond <New York> [?]
- Letter from: 2.2.1950, San Francisco (Calif.)
- Rebner-Quartett
- Letter from: 2.6.1913, Berlin (Germany)
- Letter from: 8.7.1922, Schönwald im Schwarzwald (Germany)
- Regierungsclub <Berlin>
- Letter from: 21.4.1933, Comologno (Switzerland)
- Regina Palast Hôtel <München>
- Letter from: 1.4.1913, Königsberg (Germany)
- Regional Town Planning Commission <Saint Louis, Missouri>
- Letter from: 14.3.1944, Saint Louis
- Letter from: 16.3.1944, Davenport
- Rehn Gallery
- Letter from: 12.3.1946, Washington
- Reichstag <Berlin>
- Letter from: 2.3.1915, Charlottenburg
- Letter from: 16.5.1917, Ilipan
- Letter from: 28.5.1917, Oberammergau (Germany)
- Letter from: 15.10.1917, Oberammergau (Germany)
- Rheinische Bank <Baden-Baden>
- Letter from: 26.4.1924, Baden-Baden (Germany)
- Rheinland [Linienschiff]
- Letter from: 15.4.1918, Libau
- Letter from: 16.4.1918, Libau
- Rockefeller Center <New York>
- Letter from: 16.10.1949, New York
- Letter from: 17.6.1950, New York
- Letter from: 17.12.1952, New York (N.Y.)
- Rockefeller Foundation <New York>
- Letter from: 30.4.1947, Washington
- Rockefeller Museum <Jerusalem>
- Letter from: 2.5.1938, Jerusalem
- Rockefeller Oriental Institute der Universitiy of Chicago <Luxor>
- Letter from: 17.12.1934, Egypt [auf dem Nil]
- Rosé-Quartett
- Letter from: 3.2.1911, London (England)
- Letter from: 18.6.1918, Charlottenburg (Berlin;Germany)
- Letter from: 27.9.1918, Charlottenburg (Berlin;Germany)
- Letter from: 28.9.1918, Charlottenburg (Berlin;Germany)
- Letter from: 6.10.1918, Charlottenburg (Berlin;Germany)
- Letter from: 6.10.1918, Charlottenburg (Berlin;Germany)
- Letter from: 2.5.1924, Baden-Baden (Germany)
- Rotary Club <Haifa>
- Letter from: 5.6.1937, Jerusalem
- Rothbart <Berlin> [Bauunternehmen]
- Letter from: 16.1.1925, Charlottenburg
- Royal Academy
- Letter from: 6.5.1938, Jerusalem
- Royal Academy of Arts <London>
- Letter from: 2.5.1938, London (England)
- Royal Albert Hall <London>
- Letter from: 4.10.1933, London (England)
- Royal Hawaiian <Honolulu>
- Letter from: 00.06.1952 [vor dem 3.6.], Honolulu (Hawaii)
- Letter from: 3.6.1952, Maui (Hawaii)
- Royal Pavilion <Brighton>
- Letter from: 8.7.1936, London (England)
- Royal Society of British Artists
- Letter from: 29.6.1939, London
- Rudolf-Virchow-Krankenhaus <Berlin>
- Letter from: 1.4.1918, Charlottenburg (Berlin;Germany)
- Letter from: 9.4.1918, Charlottenburg (Berlin;Germany)
- Russisches Ballett <Leningrad>
- Letter from: 8.1.1929, Menton / Alpes-Maritimes (France)
- Ruthenbergwerke <Haifa>
- Letter from: 20.1.1936, Breslau