 Striving for perfection, the designers may have added these curves, compensating for the illusion by creating their own curves, thus negating this effect and allowing the temple to be seen as they intended.It is also suggested that it was to enliven what might have appeared an inert mass in the case of a building without curves.But the comparison ought to be, according to Smithsonian historian Evan Hadingham, with the Parthenon's more obviously curved predecessors than with a notional rectilinear temple.