Henry Wadsworth Longfellow
The Old Bridge at Florence
Taddeo Gaddi built me. I am old,
  Five centuries old. I plant my foot of stone
  Upon the Arno, as St. Michael's own
  Was planted on the dragon. Fold by fold
Beneath me as it struggles. I behold
  Its glistening scales. Twice hath it overthrown
  My kindred and companions. Me alone
  It moveth not, but is by me controlled,
I can remember when the Medici
  Were driven from Florence; longer still ago
  The final wars of Ghibelline and Guelf.
Florence adorns me with her jewelry;
  And when I think that Michael Angelo
  Hath leaned on me, I glory in myself.