Jean Desire Gustave Courbet (French: [gystav kuRbe]; 10 June 1819 - 31 December 1877) was a French painter who led the Realism movement in 19th-century French painting. Committed to painting only what he could see, he rejected academic convention and the Romanticism of the previous generation of visual artists. His independence set an example that was important to later artists, such as the Impressionists and the Cubists. Courbet occupies an important place in 19th-century French painting as an innovator and as an artist willing to make bold social statements through his work.
Realist manifesto
Courbet wrote a Realist manifesto for the introduction to the catalogue of this independent, personal exhibition, echoing the tone of the period's political manifestos. In it he asserts his goal as an artist "to translate the customs, the ideas, the appearance of my epoch according to my own estimation."  The title of Realist was thrust upon me just as the title of Romantic was imposed upon the men of 1830. Titles have never given a true idea of things: if it were otherwise, the works would be unnecessary.  Without expanding on the greater or lesser accuracy of a name which nobody, I should hope, can really be expected to understand, I will limit myself to a few words of elucidation in order to cut short the misunderstandings.  I have studied the art of the ancients and the art of the moderns, avoiding any preconceived system and without prejudice. I no longer wanted to imitate the one than to copy the other; nor, furthermore, was it my intention to attain the trivial goal of "art for art's sake". No! I simply wanted to draw forth, from a complete acquaintance with tradition, the reasoned and independent consciousness of my own individuality.  To know in order to do, that was my idea. To be in a position to translate the customs, the ideas, the appearance of my time, according to my own estimation; to be not only a painter, but a man as well; in short, to create living art - this is my goal. (Gustave Courbet, 1855)

Q: What is the Realist Manifesto
A: Courbet wrote a Realist manifesto for the introduction to the catalogue of this independent, personal exhibition,

Q: Who did he send the Realist Manifesto too?
A: unknown

Q: What was included in the Realist Manifesto?
A: translate the customs, the ideas, the appearance of my time, according to my own estimation;
What happened to the Manifesto?
unknown
unknown