The Mongols swept down from the North
across the Persian plains
They massacred those who did not flee
and left their homes in flames.
The libraries that heretofore
were Persia's pride and joy
Were valueless as plunder
to the rapacious Golden Horde.
So that is why the buildings burned
and the rivers turned to black
as priceless volumes bled to death
discarded  in the Horde's attack.
A learned culture was destroyed
and never made it back
in the land that is a crossroads
and which is now known as Iraq.