Mir , the son of a stonemason, was born in Felanitx and became famous for his ability to depict both the strength and delicacy of the human form. He was known for fashioning images of historic characters of the Balearic Islands in bronze. These include sculptures he had produced of foners - men practicing the sling shot for which fighters in the Balearic Islands were famous during the period of Roman occupation.
After having learned the basic skills of stone carving from sculptors on Majorca, Mir proved gifted enough to study at the School of Fine Arts in Madrid from which he graduated with honours in 1940. Mir had been President of the Royal Academy of Fine Arts in Palma, and awarded the Ramon Llull Prize and Palma's prestigious gold medal.