James Abbott McNeill Whistler painted Arrangement in Grey and Black No. 1 in his London Chelsea studio in autumn 1871. The 144.3 × 162.4 centimetre oil-on-canvas shows the artist's 67-year-old mother Anna Matilda McNeill Whistler seated in profile against a flat grey wall. Whistler titled the painting NOT as a portrait of his mother but as an arrangement of two colours — the work that began the late-19th-century 'art for art's sake' movement.

Between 1793 and 1867 five French and Spanish paintings changed what political subject matter could look like in Western canvas painting. The five — David's Death of Marat, Goya's Third of May 1808, Delacroix's Liberty Leading the People, Courbet's Stone Breakers, and Manet's Execution of Maximilian — together form the load-bearing seventy-four-year sequence in which Western political painting moved from Neoclassical allegory to documentary Realism.

Gustave Courbet painted The Stone Breakers in autumn 1849 in his studio at Ornans, a small village in the Doubs valley of eastern France. The 165 × 257 centimetre oil-on-canvas showed two figures breaking stones beside a country road for the construction of the Ornans-Pontarlier rural highway. The painting was the central exhibit in Courbet's 1849-50 Paris Salon and was the inaugural document of the French Realism movement.

Eugène Delacroix painted Liberty Leading the People between October and December 1830, three months after the Three Glorious Days of the July Revolution (27-29 July 1830) that overthrew King Charles X of France. The 260 × 325 centimetre oil-on-canvas hangs in the Paris collection that purchased it from the Salon of 1831 for 3,000 francs.

Jacques-Louis David painted The Death of Marat in approximately three months between July and November 1793, immediately after the assassination of Jean-Paul Marat in his Paris bath on 13 July 1793. The 165 × 128 centimetre oil-on-canvas hangs Marat dead in the green-curtained wooden tub he used to soothe his chronic skin disease, the murder weapon — Charlotte Corday's small kitchen knife — visible on the floor.

The 1865 Paris Salon hung Manet's Olympia high enough that visitors had to look up to see it, and they did, in numbers large enough to require a guard. The painting was not scandalous because it showed a nude — half the Salon showed nudes. It was scandalous because of a specific set of decisions Manet had made about how the nude was painted, who she was, and what she was looking at. The mechanism, step by step.

A young woman lies naked on a white bed staring directly at the viewer. Her maid brings flowers from a client. Her cat arches its back at the foot of the bed. Manet painted Olympia in 1863, exhibited her in 1865, and the Salon riot that followed ended one century of European painting and began another.