Julio Moises Fernandez de Villasante was born in 1988 in Tortosa, Spain. He studied at the School of Fine Arts in Cadiz, where he received several prizes and a commission to decorate the magnificent Grand Theatre of the city. He moved to Barcelona in 1912, whereupon he began exhibiting regularly including San Francisco (1915) and Panama (1916). He continued to exhibit all over the world for the rest of his life.
Moises founded a free Academy of Art in Madrid in 1923, which was attended by Salvador Dali. Around the same time he was commissioned to paint the portaits of a number of the Spanish royal family, most notably King Alfonso XIII and Queen Victoria Eugenia.
Moises was apponted director of the School of Fine Arts in Madrid in 1946. He died in Suances in 1968.