"La princesse de Clèves" by Madame de La Fayette is a novel published in 1678. Set at the French court during the reign of Henri II, it follows a young woman who enters into a marriage without love, only to find herself passionately drawn to another man. Caught between duty and desire, she faces an impossible choice that will test her virtue and reshape her destiny. This groundbreaking work pioneered the psychological novel through its intimate exploration of inner conflict and moral dilemma.