Attila Sassy was a painter and graphic artist. On his father's side, he was a descendant of the noble Szabó family. He began his art studies in 1898 at the private school of Károly Ferenczy in Budapest. In Paris, he studied at Anton Ažbe's art school, then in 1904 he traveled to Munich. In 1905, he worked at Nagybánya. At the exhibition of painters in Miskolc in 1905, Margit Kaffka praised its pictures. In Miskolc, he became a member of the group of artists grouped around Margit Kaffka, his book Opium-dreams. It was then that his name became known throughout the country. In 1906, he traveled again to Munich and Paris, where he became a student at the Julian Academy, where he could learn from Jean-Paul Laurens and Lucien Simon. In 1908, he moved to Budapest and studied sculpture with Károly Ferenczy at the Hungarian Academy of Fine Arts. He exhibited in Paris, and in 1910 his exhibition held at the Budapest Art Gallery also brought him success. The József Lévay Public Culture and Museum Association organized the exhibition, which was also exhibited in Miskolc in 1910, presenting more than a hundred works. He won Leó Lánczy's prize of 500 crowns with his painting The Entombment of Christ, presented at the Art Gallery in 1917.
He used the name Aiglon to sign his works. He was in close contact with the characters of the literary life of the turn of the century, illustrations made up a large part of his graphic work. His creative work is full of diverse techniques: he created oil paintings, charcoal and ink drawings, tempera, pastel paintings, caricatures of his known friends and applied graphic works. His themes were: nudes, portraits, self-portraits, landscapes, still lifes, symbolic and biblical tableaus. In his style, he turned towards Art Nouveau and later Art Deco. His last exhibition was in 1943. In 1963, he donated many of his paintings and graphics to the Herman Ottó Museum in Miskolc.