It's a quote of one of the most famous born kids of the city. "Brest is not the most beautiful, nor the ugliest city of the world". Brest was, like more French harbour cities, very important for the Germans in World War II. It led to structural bombings from the allies, and the old Brest disappeared almost entirely.
By the way, that quote is from the Argentine top striker Gonzalo Higuaín, remarkably enough born in Brest, where his father was a football player back then. He was born in the hospital at the corner of Avenue Foch, a giant gray building: exemplary for the city.