Robert Kretzchmar

Duke Ernest of Saxe Cobourg Gotha's tour to Egypt Robert Kretzchmar

Gustav Robert Kirchhoff Anonymous

Robert Schumann, 1839 Josef Nikolaus (after) Kriehuber

Roman Military Dress Albert Kretschmer

Christian Roman Dress Albert Kretschmer

Illustration of Scientist Robert Koch Working in Laboratory Anonymous

Burial of the democratic Robert Blum shoot in October 1848 in Vienna Karl Hermann Schmolze

Roman Dress Albert Kretschmer

Gustav Robert Kirchhoff, German physicist, 1873 Unknown

German Composer Robert Schumann Anonymous

Robert Hamerling August Prinzhofer

Robert Schumann 1853 Jean Joseph Bonaventure Laurens

Robert Koch Anonymous

Robert Cecil, 1st Earl of Salisbury John de Critz

Robert Schumann, 1839 Josef Kriehuber

Interior of Robert Schumann Apartment Anonymous

German Composer Robert Franz Anonymous

Portrait of Hubert Robert Anonymous

Female Roman Dress Albert Kretschmer

Robert Parsons, 1622 English School

Robert Schumann, 1836 F. Mannheim

Richard Kevitt Rotherham with his Horse, 1832 David Gee

Robert Schumann Anonymous

Mr Robert Constantin and Mrs Maria Eleonora Berggren Gottfrid Virgin

Robert Burns James Drummond

Painting of Robert Schumann Anonymous

Engraving of Robert Koch in his Laboratory Anonymous

Portrait of Hubert Robert, 1788 Anonymous

Gustav Robert Kirchhoff, German physicist, 1876 Unknown

Robert Koch (1843-1910). Engraving. Colored. Anonymous

Christian Friedrich, Baron Stockmar, engraved by Thomas Fairland Franz Xaver (after) Winterhalter

At Romsey Abbey, 1899 Robert Bateman

Robert Montgomery (1904-1981), American actor and director Anonymous

Portrait Engraving of Robert Mills Anonymous

Robert Sterling Clark, 1921-22 William Orpen

Count Leopold Joseph von Daun, Fieldmarshall and Austrian Commander-in-Chief during the Seven Years War, defeating Frederick the Great at the... Austrian School