| 2026-01-21 | German steel city |
| 2026-01-14 | German industrial city |
| 2021-09-13 | German city in the Ruhr Valley |
| 2021-04-18 | German steel city |
| 2020-12-28 | German industrial hub |
| 2020-03-16 | German industrial city |
| 2020-02-17 | German steel city |
| 2019-05-13 | German industrial city |
| 2019-04-25 | Center of the Krupp family dynasty |
| 2018-10-29 | German steel city |
| 2017-11-16 | German steel city |
| 2017-01-29 | Ruhr industrial city |
| 2016-08-30 | Ruhr Valley city |
| 2016-07-08 | European city whose name means "eat" |
| 2016-06-14 | Krupp ironworks city |
| 2015-10-11 | German coal city, once |
| 2015-10-01 | German steel center |
| 2015-02-25 | German steel city |
| 2014-11-19 | Krupp Works city |
| 2014-11-06 | European city of 500,000+ whose name translates as "to eat" |
| 2014-10-10 | Scene of W.W. II airstrikes |
| 2014-10-06 | German industrial city |
| 2014-06-20 | Westphalian city |
| 2014-04-15 | W.W. II bomb site |
| 2014-02-17 | Ruhr Valley city |
| 2014-02-15 | Home to the Villa Hügel |
| 2014-01-09 | Western German city |
| 2013-12-02 | City on the Ruhr |
| 2013-07-29 | German steel city |
| 2013-01-27 | - |
| 2012-12-11 | Ruhr city |
| 2012-11-29 | Steel city of Germany |
| 2012-07-14 | City whose name means "eat" |
| 2012-07-12 | City north of Bonn |
| 2012-06-03 | City that hosts the world's biggest annual game fair |
| 2012-04-07 | European city whose name sounds like two letters of the alphabet |
| 2011-10-15 | Germany's University of Duisburg-___ |
| 2011-10-02 | Industrial hub of Germany |
| 2011-07-17 | City on the Ruhr |
| 2010-12-17 | Where Alfred Krupp was born |
| 2010-12-13 | Industrial city of Germany |
| 2010-04-01 | City steel in Europe |
| 2010-02-06 | Ruhr Museum locale |
| 2010-01-03 | City SSW of Münster |
| 2009-11-01 | City near Düsseldorf |
| 2009-08-02 | Ruhr industrial city |
| 2009-06-22 | Ruhr Valley city |
| 2009-05-21 | Ruhr industrial hub |
| 2009-05-11 | Krupp Works city |
| 2009-04-19 | Ruhr Valley city |
| 2009-02-08 | German city whose name means "to eat" |
| 2009-01-05 | German steel city |
| 2008-11-01 | City in North Rhine-Westphalia |
| 2008-08-02 | Prussia annexed it in 1802 |
| 2008-06-29 | City WSW of Dortmund |
| 2008-06-15 | City on the Ruhr |
| 2008-04-24 | City NW of Frankfurt |
| 2008-03-02 | 1802 acquisition of 25-Across |
| 2008-02-25 | Krupp Works city |
| 2008-02-22 | Dine, in Düsseldorf |
| 2008-01-02 | City north of Cologne |
| 2007-08-01 | Ruhr Valley city |
| 2007-06-25 | Ruhr Valley city |
| 2007-01-14 | City north of Cologne |
| 2006-10-11 | City on the Ruhr |
| 2006-10-07 | Dine, in Düsseldorf |
| 2006-08-22 | Krupp Works city |
| 2006-08-04 | Museum Folkwang site |
| 2005-12-18 | German coal city |
| 2005-10-16 | City north of Cologne |
| 2005-06-05 | Ruhr Valley city |
| 2004-08-26 | German steel city |
| 2004-08-15 | Krupp works city |
| 2003-11-03 | German industrial city |
| 2003-10-14 | Krupp Works city |
| 2003-08-14 | City near Oberhausen |
| 2003-07-02 | Ruhr Valley city |
| 2003-02-11 | Ruhr city |
| 2002-10-02 | Krupp Works city |
| 2002-07-27 | Where the Krupps worked |
| 2002-06-02 | Krupp's headquarters |
| 2002-05-09 | Ruhr-al city? |
| 2002-02-19 | Ruhr city |
| 2002-01-07 | Ruhr Valley city |
| 2001-11-12 | City near Oberhausen |
| 2001-07-11 | Krupp works city |
| 2001-06-16 | It's near Gelsenkirchen |
| 2001-06-05 | City near Düsseldorf |
| 2001-04-16 | German industrial city |
| 2001-01-21 | Bad ___ (Lower Saxony city) |
| 2000-07-02 | Big Bertha's birthplace |
| 2000-06-25 | Ruhr industrial hub |
| 2000-02-23 | Krupp Works city |
| 1999-05-15 | Where Big Bertha was built |
| 1999-03-01 | Ruhr industrial center |
| 1998-12-13 | City in the Ruhr |
| 1998-08-02 | German electricity-producing city |
| 1998-07-04 | Museum Folkwang locale |
| 1998-06-22 | City on the Ruhr |
| 1998-06-19 | Big Bertha's birthplace |
| 1998-06-14 | Have breakfast, e.g., in Germany |
| 1998-03-30 | German industrial city |
| 1998-03-24 | Krupp works city |
| 1998-03-01 | Krupp works site |
| 1998-02-20 | City NE of Düsseldorf |
| 1997-12-26 | Scene of W.W. II aerial attacks |
| 1997-11-30 | Nordrhein-Westfalen city |
| 1997-09-09 | German Pittsburgh |
| 1997-08-31 | Krupp family city |
| 1997-08-20 | Ruhr city |
| 1997-07-28 | German industrial city |
| 1997-06-23 | Industrial city of Germany |
| 1997-06-14 | City acquired by Prussia, 1802 |
| 1997-05-03 | City on the Ruhr |
| 1997-03-10 | Ruhr Valley city |
| 1996-10-28 | German city north of Cologne |
| 1996-08-09 | Altendorf is a suburb of it |
| 1996-07-22 | City on the Ruhr |
| 1996-01-27 | Ruhr city |
| 1995-09-17 | Westphalian city |
| 1995-08-25 | City north of Cologne |
| 1995-04-25 | Krupp works city |
| 1995-03-23 | Ruhr valley city |
| 1994-12-16 | Bomb site of 1943-45 |
| 1994-11-01 | German industrial city |
| 1994-02-13 | Krupp Works site |