If Miss Emily is a fallen monument, to what is she monument? Where else do related images occur?

Miss Emily is a monument to the way things used to be.... to a world that no longer exist, and a world in which she has become an oddity.

Miss. Emily's home was a monument recalling times past.

It was a big, squarish frame house that had once been white, decorated with cupolas and spires and scrolled balconies in the heavily lightsome style of the seventies, set on what had once been our most select street.

Homer's dead body was a monument to love.... or perhaps to retribution.

For a long while we just stood there, looking down at the profound and fleshless grin. The body had apparently once lain in the attitude of an embrace, but now the long sleep that outlasts love, that conquers even the grimace of love, had cuckolded him. What was left of him, rotted beneath what was left of the nightshirt, had become inextricable from the bed in which he lay; and upon him and upon the pillow beside him lay that even coating of the patient and biding dust.

Then we noticed that in the second pillow was the indentation of a head. One of us lifted something from it, and leaning forward, that faint and invisible dust dry and acrid in the nostrils, we saw a long strand of iron-gray hair.