portrait: artistic representation of one or more persons

man: male adult human

black hair: hair color

sideburns: patches of facial hair grown on the sides of the face

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

glove: covering worn on the hand

hat: shaped head covering, having a brim and a crown, or one of these

Order of Christ: former order of the Kingdom of Portugal