Bremen is an odd town in Germany. The Second World War all but removed the city from existence and anything of historical note in the city center is a reconstruction. That is, except for the city-hall and a handful of buildings around it. That this sole building survived destruction is a miracle, and has earned it a place on the UNESCO heritage list, despite there being little, if nothing else, of historical note surviving today. If you are planning a visit to Bremen, do note that there is very little else to see in the city, and you may find that it isn’t worth your time.
If you are interesting in giving the Bremen a chance, do take advantage of the churches in the city as well. Most were either reconstructed faithfully or survived to a large extent and represent most of the architectural styles through to the Renaissance. There are also a few side streets with a picturesque atmosphere. With some creativity you might be able to convince your followers on Instagram that Bremen is worth visiting.