The aesthetic and cultural perspective guided by admiration for what are perceived as classical qualities: order, maturity, harmony, balance, moderation. The central models for works striving to achieve these qualities are the literary, artistic, and architectural works of ancient Greece and Rome. In the 18th century the pursuit of these ideals became codified in terms of rules of decorum deriving from Aristotle’s Poetics and Horace’s Art of Poetry. The Augustan age in England stretched from the time of Dryden to the middle of the 18th century, and included many self-conscious attempts to imitate the poets of the Augustan age in Rome (Virgil, Horace, Ovid, Propertius). In philosophical writing Hume is the most self-consciously Augustan of the great philosophers. In the late 18th century the more idiosyncratic, free, unfettered spirit of Romanticism rebelled against what became perceived as the artificial restrictions of classicism.