The document discusses the Three Unities - Unity of Time, Place, and Action - which were rules for dramatic structure derived from Aristotle's Poetics. The Unity of Time requires the action to take place within 24 hours. Unity of Place requires a single location. Unity of Action demands one main plot with few subplots contributing to the main plot. These rules were redefined in 1570 and referred to as Aristotelian rules for drama. The document provides examples and discusses opinions on the Three Unities from Dryden, Ben Jonson, and Dr. Johnson.