Stadthaus by Nemorino
Block N1 consists of a large modern building called the City House (Stadthaus). It houses the city library, seen here, as well as numerous offices, shops, restaurants and cafés. On the other side, facing Paradeplatz, there is also a Tower Café which is open from 4 p.m. to midnight.
(This is the kind of photo that looks a lot different when you enlarge it. Does anybody know why that is?)