  We first give a complete, albeit brief, review of the discovery of mirror
symmetry in $N=2$ string/conformal field theory. In particular, we describe the
naturality arguments which led to the initial mirror symmetry conjectures and
the subsequent work which established the existence of mirror symmetry through
direct construction. We then review a number of striking consequences of mirror
symmetry -- both conceptual and calculational. Finally, we describe recent work
which introduces a variant on our original proof of the existence of mirror
symmetry. This work affirms classical--quantum symmetry duality as well as
extends the domain of our initial mirror symmetry construction.
