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[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.