Neoclassical architecture was an architectural style produced by the neoclassical movement that began in the mid-18th century, both as a reaction against the Rococo style of anti-tectonic naturalistic ornament, and an outgrowth of some classicizing features of Late Baroque. In its purest form it is a style principally derived from the architecture of Classical Greece.
Siegfried Giedion, whose first book (1922) had the suggestive title Late Baroque and Romantic Classicism,
asserted later "The Louis XVI style formed in shape and structure the end of late baroque tendencies, with classicism serving as its framework." In the sense that neoclassicism in architecture is evocative and picturesque, a recreation of a distant, lost world, it is, as Giedion suggests, framed within the Romantic sensibility.
Intellectually Neoclassicism was symptomatic of a desire to return to the perceived "purity" of the arts of Rome, the more vague perception ("ideal") of Ancient Greek arts and, to a lesser extent, sixteenth-century Renaissance Classicism, the source for academic Late Baroque.
Many neoclassical architects were influenced by the drawings and projects of