Neo-Classicism was an artistic movement that began in the mid-18th century in Europe as a reaction against Baroque and Rococo styles. It drew inspiration from classical antiquity, particularly the ideals of democracy and republicanism of ancient Greece and Rome. Key developments included excavations of Pompeii and Herculaneum, publications on antiquity, arrival of the Elgin Marbles, and Johann Winckelmann's promotion of imitating classical ideals. Neo-Classicism was characterized by purity, idealized forms, and a belief in universal order. It influenced architecture, painting, sculpture and beyond in Europe and America into the 19th century.