Modern art is when ever artists use new subjects, materials, and techniques. In the 18th century the concept of space was used in France this was considered modern art. In the mid 19th century the rise of bohemian artists painting stood as the scandal of the time but then it became the legacy in the future.
The first period to use planar recession was neoclassicism. Neoclassicism is harsh sculptural lines planar instead of linear recession into spa