An aesthetic attitude dependent on principles based in the culture, art and literature of ancient Greece and Rome, with the emphasis on form, simplicity, proportion, clarity of structure, perfection, restrained emotion, as well as explicit appeal to the intellect. OR: The revival of the attitudes and styles of expression of classical literature; generally used to describe a period in European history beginning in the late seventeenth century and lasting until about 1800. In its purest form, it marked a return to order, proportion, restraint, logic, accuracy, and decorum.