Gogh is believed to have shot himself in the chest with a revolver, dying from his injuries two days later. Van Gogh was commercially unsuccessful during his lifetime, and he was considered a madman and a failure. As he became famous only after his suicide, he came to be seen as a misunderstood genius in the public imagination. His reputation grew in the early 20th century as elements of his style came to be incorporated by the Fauves and German Expressionists. He attained widespread critical and commercial success over the ensuing decades, and is remembered as an important but tragic painter whose troubled personality typifies the romantic ideal of the tortured artist. Today, Van Gogh's works are among the world's most expensive paintings to have ever sold, and his legacy is honoured by a museum in his name, the Van Gogh Museum in Amsterdam, which holds the world's largest collection of his paintings and drawings. Letters The most comprehensive primary source on Van Gogh is the correspondence between him and his younger brother, Theo. Their lifelong friendship, and most of what is known of Vincent's thoughts and theories of art, are recorded in the hundreds of letters they exchanged from 1872 until 1890. Theo van Gogh was an art dealer and provided his brother with financial and emotional support as well as access to influential people on the contemporary art scene. Theo kept all of Vincent's letters to him; but Vincent kept only a few of the letters he received. After both had died, Theo's widow Jo Bonger-van Gogh arranged for the publication of some of their letters. A few appeared in 1906 and 1913; the majority were published in 1914. Vincent's letters are eloquent and expressive and have been described as having a "diary-like intimacy", and read in parts like autobiography. Translator Arnold Pomerans wrote that their publication adds a "fresh dimension to the understanding of Van Gogh's artistic achievement, an understanding granted to us by virtually no other painter". There are more than 600 letters from Vincent to Theo and around 40 from Theo to Vincent. There are 22 to his sister Wil, 58 to the painter Anthon van Rappard, 22 to Émile Bernard as well as individual letters to Paul Signac, Paul Gauguin, and the critic Albert Aurier. Some are illustrated with sketches. Many are undated, but art historians have been able to place most in chronological