Jacobus Hendrik (Henk) Pierneef (usually referred to as Pierneef) (Pretoria, 1886–1957), was a South African landscape artist (from Dutch parents), generally considered to be one of the best of the old South African masters.
His distinctive style is widely recognised and his work was greatly influenced by the South African landscape.
Most of his landscapes were of the South African highveld, which provided a lifelong source of inspiration for him. Pierneef's style was to reduce and simplify the landscape to geometric structures, using flat planes, lines and colour to present the harmony and order in nature.