Constant Anton Nieuwenhuys, better known as Constant, was a Dutch painter, sculptor, graphic artist, author and musician. He was born in Amsterdam on 21 July 1920 as the first son of Pieter Nieuwenhuijs and Maria Cornelissen. Their second son Jan Nieuwenhuys was born a year later. Both sons became artists although their parents had no apparent interest in art.

As a young child Constant drew passionately and showed great talent. He read literature with a special preference for poetry and played musical instruments. During his teenage years he learned to sing and to read music while in the church choir at a Jesuit school. In his later years, greatly inspired by gypsy music, he only played improvised music. He played guitar, violin and ...