The document discusses the emergence and characteristics of Neoclassical architecture. It began in the 18th century as a reaction against Rococo style, drawing inspiration from classical Greek, Roman, and Renaissance designs. Key features included simplicity, symmetry, and the use of columns. Prominent Neoclassical architects like Etienne-Louis Boullée and Claude Nicolas Ledoux designed dramatic large-scale buildings evoking themes of grandeur, emotion, and the expression of a structure's purpose through its form. Examples highlighted include Boullée's unbuilt Cenotaph for Newton and Ledoux's built Royal Saltworks at Arc-et-Senans.