portrait: artistic representation of one or more persons

studio: working places set aside for artists to work, the term is generally applied to workspaces used by artists creating fine art, particularly art dating from the 16th century to the present

arm: forearm and upper arm together without hand and shoulder

military uniform: standardised dress worn by members of the armed forces and paramilitaries of various nations

José Joaquim Machado de Oliveira: Brazilian politician (1790-1867)