Throughout the 18th century, a counter movement opposing the Rococo sprang up in different parts of Europe, commonly known as Neoclassicism. It despised the perceived superficiality and frivolity of Rococo art, and desired for a return to the simplicity, order and 'purism' of classical antiquity, especially ancient Greece and Rome. The movement was in part also influenced by the Renaissance, which itself was strongly influenced by classical art. Neoclassicism was the artistic component of the intellectual movement known as the Enlightenment; the Enlightenment was idealistic, and put its emphasis on objectivity, reason and empirical truth. Neoclassicism had become widespread in Europe throughout the 18th century, especially in the United Kingdom, which saw great works of Neoclassical architecture spring up during this period; Neoclassicism's fascination with classical antiquity can be seen in the popularity of the Grand Tour during this decade, where wealthy aristocrats travelled to the ancient ruins of Italy and Greece. Nevertheless, a defining moment for Neoclassicism came during the French Revolution in the late 18th century; in France, Rococo art was replaced with the preferred Neoclassical art, which was seen as more serious than the former movement. In many ways, Neoclassicism can be seen as a political movement as well as an artistic and cultural one. Neoclassical art places an emphasis on order, symmetry and classical simplicity; common themes in Neoclassical art include courage and war, as were commonly explored in ancient Greek and Roman art. Ingres, Canova, and Jacques-Louis David are among the best-known neoclassicists.