A style in architecture and the visual and decorative arts that was inspired by the art and culture of the ancient Greeks and Romans. Neoclassicism became popular in Europe and America in the 18th century, at a time when new discoveries at Pompeii and Herculan-eum increased public interest  in the arts of antiquity.  The hallmarks of the Neoclassical style are clarity, simplicity, symmetry and idealization. Web resource here.

William Chambers. The Sculpture Collection of Charles Townley in the Dining Room of his House in Park Street, Westminster. Pen and ink and watercolor on paper. 1794. British Museum, London.