French Neoclassicism in theatre emerged in 17th-century France during Louis XIV's reign. Influenced by Enlightenment ideals, it emphasized reason, order, and classical principles, reacting against Baroque extravagance and reflecting the absolutist monarchy's centralized power. Key figures like Corneille, Racine, and Molière shaped this movement. Their works adhered to strict rules, including the three unities and genre separation, while focusing on universal themes and moral instruction. This style dominated European theatre for over a century.