The passage is from the National Park Service.

Concentrated on a short mile and a half of Auburn Avenue, the Sweet Auburn Historic District reflects the history, heritage and achievements of Atlanta’s African Americans.

The name "Sweet Auburn” was coined by John Wesley Dobbs, referring to

the sweet shop serving the local neighborhood.
the color of the residents’ homes.
“the fragrance and beauty of the trees lining the street.”
“the richest Negro street in the world.”