Marius Bunescu was a Romanian painter, organizer of the National Museum of Art and director of the Anastase Simu Museum. Born in Caracal, he trained first with Dimitrie Hârlescu in Constanța between 1904 and 1906, then at the Academy of Fine Arts in Munich under Hermann Groeber. He debuted in 1911 at the Official Salon in Bucharest, and in 1924 he showed paintings in the Romanian pavilion at the Venice Biennale, returning to it in 1942 and 1954.
From 1920 he directed the Anastase Simu Museum, a post he expanded after the collector's death in 1935. In 1921 he helped found the Fine Arts Union, serving as its secretary and, from 1923 to 1927, as its president. He received the National Prize for Painting in 1938, and in 1949 he took over the Picture Gallery of the National Museum of Art.
His work is associated with Impressionism. He died in Bucharest in 1971. Some of his paintings, including Venice views and the Danube at Cazan, appeared on stamps issued by Poșta Română. The art gallery at the high school in Caracal, which he championed in 1946, now bears his name.