It is mid-afternoon. The sun has travelled across much of the sky and is now illuminating the arches, the colonnade in front of the Town Hall in Bremen. Tourists cross the cobble-stoned space between the houses of politics, of business and commerce, swinging their arms up to point at the majesty of the Bremen Dom, dodging the red and white trams, snapping photographs on their mobile devices, or posing while others capture their image in front of the grimy facades.