Question: How large is this city in North Rhine-Westphalia as compared to other cities in Germany from which the Krupp family comes?
Context: The Oppenwehe Moor (German: "Oppenweher Moor" ) is a raised bog in the natural region of Diepholz Moor Depression ("Diepholzer Moorniederung") in North Germany.  It covers a total area of around 700 ha and lies in the northeastern part of the German state of North Rhine-Westphalia as well as in Lower Saxony.  It is one of the most important bogs in Northwest Germany and is one of the ten most important wet meadow reserves in North Rhine-Westphalia.  It is part of the Dümmer Nature Park. Schmallenberg is a town and a climatic health resort in the High Sauerland District, Germany.  Relating to its size of 117 square miles (303 square kilometers) it is the of all cities and towns of the state of North Rhine-Westphalia and the second biggest of Westphalia.  It also has the biggest area of all cities and towns in North Rhine-Westphalia that are not independent but belong to a district. Freies Werkstatt-Theater is a theatre in Cologne, North Rhine-Westphalia, Germany.  It is managed as a public utility and sponsored by the City of Cologne and the state of North Rhine-Westphalia.  It was founded in Cologne in 1977 as part of the nationwide pilot project 'Artists and Students'.  Since 1995 it has been located in a redesigned and refurbished listed building in the south of the city.  Its five floors include two venues, two foyers, rehearsal, office, and workshop space Essen (] ; Latin: "Assindia") is a city in North Rhine-Westphalia, Germany.  Its population of approximately 589,000 (as of 31 2016 ) makes it the ninth-largest city in Germany.  It is the central city of the northern (Ruhr) part of the Rhine-Ruhr metropolitan area and seat to several of the region's authorities.  Essen is seat to 13 of the 100 largest German corporations, including three DAX corporations, placing the city second only to Munich and on-par with Frankfurt am Main in number of corporate headquarters. Bertha Krupp von Bohlen und Halbach (29 March 1886 – 21 September 1957) was a member of the Krupp family, Germany's leading industrial dynasty of the 19th and 20th centuries.  As the elder child and heir of Friedrich Alfred Krupp she was the sole proprietor of the Krupp industrial empire from 1902 to 1943, although her husband, Gustav Krupp von Bohlen und Halbach, ran the company in her name.  In 1943 ownership of the company was transferred to her son Alfried. The Villa Hügel is a 19th-century mansion in Bredeney (part of the modern city of Essen) in Germany.  It was built by Alfred Krupp in 1870-3 as his main residence and was the home of the Krupp family of industrialists until after World War II.  More recently, the Villa Hügel has housed the offices of the Kulturstiftung Ruhr (Ruhr Cultural Foundation) as well as an art gallery and the historical archive of the Krupp family and company. The Langenberg rises on the state border between North Rhine-Westphalia and Hesse in Germany and, at  sea level (NN) ,<includeonly></includeonly> is the highest peak in the Rothaar mountain range, as well as the highest point in the North Rhine-Westphalia and also in the north of Germany outside the Harz Mountains. Cologne ( ; German: "Köln" , ] , Colognian: "Kölle" ] ) is the largest city in the German federal State of North Rhine-Westphalia and the fourth-largest city in Germany (after Berlin, Hamburg, and Munich).  It is located within the Rhine-Ruhr metropolitan region, one of the major European metropolitan areas, and with more than ten million inhabitants, the largest in Germany.  Cologne is about 45 km southwest of North Rhine-Westphalia's capital of Dusseldorf and 25 km northwest of Bonn. The Arms of Krupp (1968) is William Manchester's history of the Krupp dynasty, which owned and ran a dominant armaments manufacturing company in Germany.  The company was based in Essen.  The book presents very readable descriptions of the behavior of the Krupp family and its firm from the Thirty Years' War to the Kaisers, the Weimar Republic, the Nazis, the American occupation, and finally the Bonn government.  The book describes how under each regime (except possibly Weimar) the family and firm received favorable treatment, culminating in a special law Lex Krupp.  Bizarre facets of families members are presented in detail.  The innovative social welfare programs for factory workers are starkly contrasted with the treatment of forced laborers (ostarbeiters, etc.) Manchester's book tells presumably all-from the first Krupp (circa 1500) "a shrewd chandler with a keen eye for the main chance," through the family's incarnation by the sixth generation as "Essen's uncrowned kings," to the powerful weapons empire that armed Germany for three major wars, and finally the dissolution of die Firma.  Manchester slants his story; in this case, the Krupps are all malevolent.  The "killing power" of the kruppsche wares (cannon, howitzers, batteries, finally, nuclear power) was unrivaled as early as 1880, and in Manchester's view their product suited the family's temperament.  He does differentiate between the various Alfreds, Alfrieds, and Berthas—but shows every member with some unfortunate trait.  Their way of life is "secretive," their huge empire "international," their tendency is toward cartels, and their appearance is "vulpine."  The foxy family's most "phenomenal" habit, however, was that "of matching the Teuton mood"—i.e. they were nationalistic, Francophile, or severely militaristic when Germany adopted these stances.  But Manchester doesn't quite make it clear whether he is charging them with fierce patriotism or whoring. The Krupp family (see pronunciation), a prominent 400-year-old German dynasty from Essen, have become famous for their production of steel, artillery, ammunition, and other armaments.  The family business, known as Friedrich Krupp AG, was the largest company in Europe at the beginning of the 20th century.  It was important to weapons development and production in both world wars.  One of the most powerful dynasties in European history, for 400 years Krupp flourished as the premier weapons manufacturer for Germany.  From the Thirty Years' War until the end of the Second World War, they produced everything from battleships, U-boats, tanks, howitzers, guns, utilities, and hundreds of other commodities.
Answer: the ninth-largest