From Vincent Van Gogh to his brother Theo, 1888. Courtesy Vincent van Gogh Foundation. [via]
From Pablo Picasso to his dear friend Gertrude Stein. [via]
From Henri Matisse to Francoise Gilot, as seen in Matisse and Picasso: A Friendship in Art . [via]
From Eugene Delacroix to Mr. Haro, his paint dealer. [via]
From Frida Kahlo to a friend, with lipstick kisses for everyone. [via]
From Rockwell Kent to Frances Kent, 1929. [via]
From Alexander Calder to Agnes Rindge Claflin, an illustrated list of the sculptures of his he wants her to see in New York, c. 1942. [via]
From Paul Gauguin to Vincent Van Gogh, 1889. [via]
From René Magritte to Paul Colinet. [via]
From Gustav Klimt to his life-long friend Emilie Flöge, 1897. Courtesy Leopold Museum. [via]
From Georgia O’Keeffe to Alfred Stieglitz, 1929. [via]
From Salvador Dalí to Tom Honeyman, 1932. [via]