The Prettiest Flag

The prettiest flag I ever saw
Is not on the courthouse lawn.
Nor is it the flag flying o're my house
When the 4th is about to dawn.
 
No, it's not even the flag they fought to save
On battlefields long ago,
Or the one that flies o're Washington
In the rain and sleet and snow.
 
All these flags are glorious
And were banners for the brave.
No, the prettiest flag I ever saw
Was on my father's grave.