[T]he Famous Rules which the French call, Des Trois Unitez , or, The Three Unities, which ought to be observ'd in every Regular Play; namely, of Time, Place, and Action.
An Essay of Dramatic Poesy (1668)
[T]he Famous Rules which the French call, Des Trois Unitez , or, The Three Unities, which ought to be observ'd in every Regular Play; namely, of Time, Place, and Action.