This Neo-Renaissance building with 38-meter high tower used to serve as a landmark for sailors. Today, it is an industrial monument.
Wikipedia (German) http://de.wikipedia.org/wiki/Altes_Hafenamt_Dortmund
Official website http://www.dortmunder-hafen.de/?siteID=26
Address Sunderweg 130, 44147 Dortmund, Germany
Coordinates 51°31'33.213" N 7°26'33.201" E