1. The document discusses several 18th century European artworks, including paintings, sculptures, and architectural works that exemplified Neoclassicism and the Enlightenment. 2. Many of the artworks depicted themes from classical antiquity and aimed to promote Enlightenment ideals of reason, virtue, and republican government. 3. Architects like Burlington and Langhans incorporated classical Greek and Roman styles like those of Palladio and the Propylaea into their Neoclassical buildings.