Yeats - First poem in (1936) Oxford book of modern verse (on the Mona Lisa / La Gioconda)

She is older than the rocks among which she sits;
Like the Vampire,
She has been dead many times,
And learned the secrets of the grave;
And has been a diver in deep seas,
And keeps her fallen day about her;
And trafficked for strange webs with Eastern merchants;
And, as Leda,
Was the mother of Helen of Troy,
And, as St. Anne,
Was the mother of Mary;
And all this has been to her but as the sound of lyres and flutes,
And lives
Only in the delicacy
With which it has moulded the changing lineaments,
And tinged the eyelids and the hands.