Why is she called a "fallen monument" in the first paragraph?Women of the Old South and of a "good family" were often put on pedestals as paragons...

The Old South was ran by families with an equal financial
and social power to the aristocracy in Europe.  Emily Grierson belonged to one of such
families back in her youth. The irony comes after the War, and during the reconstruction
of the South how families that once lived off prestige, pedigree, money, and privileges
had to make do without any of it. Their old colonial mansions fell to the ground and
into oblivion. The old mannerisms, customs, and traditions of old were also succumbing
to the changing times. Emily, like those old, strong plantations, was a thing of the
past gone awry. She is a vestige, a symbol of a past that will not return. She is a
fallen monument for that same reason: All that defined her and put her in the pedestal
of Old Southern magnificence is now gone forever, and she is unable to move on from
it.