Impressionism coalesced in the 1860s when a group of painters including Claude Monet, Alfred Sisley and Pierre-Auguste Renoir pursued plein air painting together. Impressionism was a radical art movement that began in the late 1800s, centered primarily around Parisian painters. Impressionists rebelled against classical subject matter and embraced modernity, desiring to create works that reflected the world in which they lived. Uniting them was a focus on how light could define a moment in time, with color providing definition instead of black lines . Do you appreciate Art ?