The Ehrenhof complex with its expressionistic architecture is worth seeing for itsself.
It consists of the "Kunstmuseum" at rhine's waterside, the Kunspalast and the Tonhalle.
Althought the Tonhalle is a little bit sepearated from the Ehrenhof complex, it belongs to it.

Kunstmuseum Düsseldorf
Tonhalle Düsseldorf
Maps