Works
- Ibn-Tulun-Moschee / Kairo
- Letter from: 10.1.1935, London (England)
- Ibsen, Henrik / Die Kronprätendenten
- Letter from: 31.7.1915, Dresden (Germany)
- Ibsen, Henrik / Peer Gynt
- Letter from: 5.10.1914, Berlin (Germany)
- Letter from: 6.10.1914, Berlin (Germany)
- Letter from: 16.1.1925, Fürstenberg (Germany)
- Illustrationen <Thomas Mann> / ... [Bemerkungen einer unbekannten Lady]
- Letter from: 5.11.1945, Croton-on-Hudson (N.Y.)
- Im Westen nichts Neues <Film> / Milestone, Lewis / 1930
- Letter from: 4.1.1931, Paris
- Impressionismus <Kunstrichtung>
- Letter from: 14.12.1910, München
- Letter from: 31.10.1912, München
- Industrie mit Kran <Skizze>
- Letter from: 27.6.1917, Oberammergau (Germany)
- Letter from: 2.7.1917, Ilipan
- Letter from: 9.7.1917, Oberammergau (Germany)
- Letter from: 20.8.1917, Ilipan
- Industrie mit Turm <Skizze>
- Letter from: 3.7.1917, Oberammergau (Germany)
- Letter from: 10.7.1917, Ilipan
- Industriebauten <Publikation> / Wasmuth Verlag
- Letter from: 19.11.1917, Dünastellung
- Industriegebäude <Skizzen> / 1917
- Letter from: 13.6.1917, Ilipan
- Letter from: 17.6.1917, Ilipan
- Letter from: 6.7.1917, Ilipan
- Letter from: 10.7.1917, Ilipan
- Letter from: 15.7.1917, Oberammergau (Germany)
- Islamische Kunst in Europa <Buch>
- Letter from: 29.6.1917, Ilipan
- Letter from: 10.7.1917, Ilipan
- Ivory Tower
- Letter from: 19.3.1942, Michigan