Modern art is the umbrella name for artistic work produced roughly from the 1860s to the 1970s, covering the styles and philosophies that emerged when artists threw aside the traditions of the past in a spirit of experimentation. It begins with the post-impressionists - Cézanne, Van Gogh, Gauguin, Seurat - and runs through Fauvism, Cubism, Expressionism and Surrealism to Abstract Expressionism and Pop. No single style defines it: what unites the era is a tendency away from narrative toward abstraction, fresh ways of seeing, and new ideas about what materials and art itself are for. The date most often given for its birth is 1863, when Manet's Le déjeuner sur l'herbe appeared at the Salon des Refusés in Paris. Later production is usually called contemporary or postmodern art.
Lead image of the Wikipedia article "Modern art".Public domain (credit: Vincent van Gogh) · source
Defining characteristics
Self-conscious experimentation: traditions of the past deliberately set aside
Visible, unhidden materials and making: brushwork, collage, and surface kept legible
Flattened pictorial space and forms reduced to geometry
A drift from narrative naturalism toward abstraction
Modern subject matter: the city, machines, the unconscious, and non-Western art
Key figures
Paul Cézanne(1839-1906) — Post-impressionist whose reduced geometry and faceted planes laid the groundwork for Cubism
Vincent van Gogh(1853-1890) — Post-impressionist whose expressive color and brushwork made subjective feeling the true subject
Henri Matisse(1869-1954) — Leader of the Fauves, who freed color from descriptive duty
Pablo Picasso(1881-1973) — Co-inventor of Cubism and the century's most protean modernist
Marcel Duchamp(1887-1968) — Redrew the boundary of art itself with his readymades