|Covid-19|June 28 – Claude Monet marries his mistress and model Camille Doncieux in Paris; Gustave Courbet is a witness.
July – Franco-Prussian War breaks out: Monet and Pissarro flee to London; Cézanne and his mistress, Marie-Hortense Fiquet, leave Paris for L'Estaque (on the French Riviera) where he predominantly paints landscapes. In September the Dutch painter Lourens Alma Tadema moves permanently to London where he adopts the name Lawrence Alma-Tadema.
Édouard Manet and Louis Edmond Duranty fight a duel at Café Guerbois, Paris.
Russian industrialist and patron of the arts Savva Mamontov acquires the Abramtsevo Colony and hosts a group of traditionalist artists there.
Dante Gabriel Rossetti's Poems are published, exhumed from Elizabeth Siddal's grave.
Daoud Corm goes to Rome to study under Roberto Bompiani at the Accademia di San Luca.
Wilhelm Amberg – Reading from Goethe's Werther (Vorlesung aus Goethes Werther)
Countryside near Lex
Studio in the rue Condamine
Cathy Madox Brown – Ford Madox Brown at his Easel
Ford Madox Brown – Romeo and Juliet
Edward Burne-Jones – Phyllis and Demophoon
Paul Cézanne – Paul Alexis reading a manuscript to Émile Zola (1869–70; São Paulo Museum of Art)
Edgar Degas – Count Lepic and His Daughters
Jean-Jules-Antoine Lecomte du Nouÿ – Demosthenes Practicing Oratory (Démosthène s'exerçant à la parole)
Henri Fantin-Latour – A Studio in the Batignolles (Musée d'Orsay, Paris)
Anselm Feuerbach – The Judgement of Paris (c. 1869–70)
Mariano Fortuny – The Spanish Wedding (Museu Nacional d'Art de Catalunya)
Jean-Léon Gérôme – Moorish Bath
Arthur Hughes – You Cannot Barre Love Oute
Jean-Paul Laurens – Pope Formosus and Stephen VI (Le Pape Formose et Étienne VII)
La Brioche (Metropolitan Museum of Art, New York)
Effect of Snow on Petit-Montrouge (National Museum Cardiff)
John Everett Millais – The Boyhood of Raleigh (Tate Britain, London)
Madame Clémentine Valensi Stora (L'Algérienne)
Dante Gabriel Rossetti
Beata Beatrix (approximate completion date)
Dmitri Sinodi-Popov – An Old Greek
Captain Frederick Gustavus Burnaby
La Partie carrée
Raja Ravi Varma – Shakuntala
Abraham Lincoln (Brown), New York City
Grand Prix de Rome, painting:
Grand Prix de Rome, sculpture:
Grand Prix de Rome, architecture: Albert-Félix-Théophile Thomas.
Grand Prix de Rome, music: Charles Edouard Lefebvre & Henri Maréchal
January 11 – Alexander Stirling Calder, sculptor (died 1945)
March 13 – William Glackens, painter (died 1938)
June 22 – Dattilo Rubbo, painter and art teacher (died 1955)
July 21 – Emil Orlik, painter and lithographer (died 1932)
July 25 – Maxfield Parrish, painter and illustrator (died 1966)
November 18 – Franz Metzner, sculptor (died 1919)
December 23 – John Marin, painter (died 1953)
date unknown – Arthur Diehl, landscape painter (died 1929)
January 17 – Alexander Anderson, American illustrator (born 1775)
January 27 – Johannes Flintoe, Danish-Norwegian painter of Norwegian landscapes (born 1787)
February 21 – Robert Jefferson Bingham, English-born photographer (born 1824 or 1825)
March 19 – William Egley, English miniature painter (born 1798)
April 25 – Daniel Maclise, Irish-born painter (born 1806)
May 17 – David Octavius Hill, Scottish painter and pioneer photographer (born 1802)
July 13 – Christian Albrecht Jensen, Danish painter (born 1792)
August 25 – Richard Seymour-Conway, 4th Marquess of Hertford, English francophile art collector (born 1800)
November 7 – Cornelia Aletta van Hulst, Dutch painter (born 1797)
November 28 – Frédéric Bazille, French Impressionist painter (born 1841) (killed in action)
Max Emanuel Ainmiller, German glass painter (born 1807)
Patrick MacDowell, Irish sculptor from Belfast (born 1799)
December 12 – Martin Cregan, Irish portrait painter (born 1788)
Undated – Achille Leonardi, Italian genre painter (born 1800)
1870 in art Wikipedia
Events from the year 1870 in art.