Otto Sommer

Along the Mountain Edge, 1870 Otto Sommer

Union Drover with Cattle for the Army, 1860 Otto Sommer

Summer Clouds over Gossfelden Otto Ubbelohde

Youthful portrait of the young King Otto Greek School

July, 1893 Otto H. Bacher

The Work Horse, 1866 Otto Bache

Otto I Submitting to Berenger II and the Triumph of Italy German School

A Day at the Beach Otto Eerelman

Otto von Bismarck, c.1850 German School

Entrance of Otto of Bavaria into Nauplia, 6th February 1833 German School

Emperor Otto II Anonymous

Portrait of Otto, King of Greece Anonymous

Otto Lilienthal makes one of his last flights Anonymous

Portrait of the Painter Otto Mueller, c.1914 Curt Herrmann

The Otto Cycle Anonymous

Self Portrait, c.1921 Otto Muller or Mueller

Nikolaus Otto Anonymous

The Stadtbahn Pavilion of the Vienna Underground Railway, design showing the exterior and a view of the railway platform, c.1894-97 Otto Wagner

Tannhäuser and Venus, 1873 Anonymous

Otto I, King of Greece Anonymous

Portrait of Prince Otto von Bismarck, 1834 German School

A Wet Evening in Venice Otto Henry Bacher

Head, 1913-1914 Otto Gutfreund

Otto von Bismarck, vers 1890 Franz Seraph von Lenbach

Otto von Bismarck Franz Seraph von Lenbach

Spring Otto Eckmann

Red, 1931 Otto Freundlich

Otto Salzer, 1905(?) Unknown

Moutainous landscape with waterfall Otto Wagner

Otto von Bismarck, Chancellor of the Empire at the Tribune of the Reichstag, 1889 French School

A Day at the Seashore Otto Leyde

Sitting Pair, 1920 Otto Muller or Mueller

Otto von Guericke, German inventor, engineer and physicist, 1672 Unknown

The Slave Market Otto Pilny

Torzhok, 1824-1830 Otto August Malmborg

Portrait of Otto von Bismarck Anonymous