Robert Koehler

Head of an Old Woman, 1881 Robert Koehler

Rainy Evening on Hennepin Avenue, c.1902 Robert Koehler

Portrait of Robert Koehler, 1910 Philip Little

Illustration of Scientist Robert Koch Working in Laboratory Anonymous

Robert Koch Anonymous

Robert Harley, 1st Earl of Oxford, 1714 Godfrey Kneller

Engraving of Robert Koch in his Laboratory Anonymous

Papa Cobden taking Master Robert a free trade walk, 1845 Richard Doyle

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

Robert Hamerling August Prinzhofer

Letter from Caleb Cheeshahteaumauk to Robert Boyle Caleb Cheeshahteaumauk

Colwich - Tomb of Robert Wolseley: pen and ink drawing, 1837 Thomas Peploe Wood

Robert Koch Anonymous

Memoirs of George III, by Robert Huish Eldridge

Robert Taylor (1911-1969), American actor Anonymous

Portrait of Robert Boyle Anonymous

German Composer Robert Schumann Anonymous

A Brittany Beach Robert Buhler

Rubus Köhleri Köhler's Bramble Anonymous

Portrait of Robert Junius Arnoldus Montanus

Portrait of Hubert Robert Anonymous

Robert Young, American actor Anonymous

Robert E. Lee Smiling Anonymous

Robert Peel (1788-1850) Anonymous

Portrait of Robert Rogers Anonymous

Robert Young, American actor Anonymous

Lithograph of Robert Schumann Posing with His Wife Hofelich

German Composer Robert Franz Anonymous

Interior of Robert Schumann Apartment Anonymous

Robert Harley, 1st Earl of Oxford and Mortimer English School

Portrait of Colonel Robert Gould Shaw Anonymous

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

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

Robert Schumann Anonymous

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

Robert Colquhoun, 1914 - 1962. Artist (Self-portrait) Robert Colquhoun