The art movement known as Post-Impressionism developed during the late 1800s as a reaction against the constraints of Impressionism. Post-Impressionist artists built upon Impressionist foundations to introduce deeper personal expression and symbolic elements along with formal structures in their artwork. Post-Impressionist artists utilized vibrant colors and bold brushwork to move away from naturalistic depiction while focusing on emotional expression and artistic introspection. Vincent van Gogh stands out among Post-Impressionist artists through his emotionally charged works such as "Starry Night" and "Sunflowers," while Paul Cézanne made significant contributions to modern art with his studies of form and space. Georges Seurat stands out as a notable artist who developed Pointillism through the use of tiny color dots to craft detailed and radiant artworks. The late 19th and early 20th centuries marked the height of Post-Impressionism which set the foundation for subsequent modernist movements. This innovative and expressive artistic movement continues to shape artists and art movements throughout the present day demonstrating its lasting impact.