dissolved_or_abolished trier 
Frankfurt am Main is a metropolis and the largest city in the German state of Hesse and the fifth - largest city in Germany , with a ___MASK29___ population of 731 , 095 within its administrative boundaries , and 2 . 3 million in its urban area . The city is at the centre of the larger Frankfurt Rhine - Main Metropolitan Region , which has a population of 5 . 8 million and is Germany ' s second - largest metropolitan region after Rhine - Ruhr . Since the enlargement of the European Union in 2013 , the geographic centre of the EU is about to the east of Frankfurt ' s CBD , the Bankenviertel . Frankfurt is culturally and ethnically diverse , with around half of the population , and a majority of young people , having a migration background . A quarter of the population are foreign nationals , including many expatriates . Düsseldorf ( Low Franconian , Ripuarian : " Düsseldörp " ) is the capital city of the German state of North Rhine - Westphalia and the seventh most populous city in Germany . Düsseldorf is an international business and financial centre , renowned for its fashion and trade fairs . The city is headquarters to one Fortune Global ___MASK14___ and two DAX companies . Messe Düsseldorf organises nearly one fifth of premier trade shows . Trier was one of the three Regierungsbezirke of Rhineland - Palatinate , Germany , located in the west of the state . The region was created in 1815 as part of the Prussian Rhineland . Until 1920 the bulk of what then became the Territory of Saar Basin was part of the Trier Region . Only the east of the Saar Territory , today ' s Saar - Palatinate district , formerly the western fringes of the then Bavarian Rhenish Palatinate , was previously no part of the Trier Region . In April 1937 the St . Wendel - Baumholder district , formed in 1920 from those parts of the St . Wendel district that had not been seceded to the Saar Territory , was dissected from the Trier Region and merged in the new Birkenfeld district within the Koblenz Region . After the Second World War the French military government several times extended the Saar area before forming the Saar Protectorate , also including additional 109 municipalities belonging until July 1946 to the Trier Region and some to the Koblenz Region . Koblenz Region ' s former areas make up part of today ' s St . Wendel district in the Saarland . In December 1946 , when a new customs boundary dissected the Saar Protectorate ( later becoming the Saarland ) from the area under the Allied Control Council over Allied - occupied Germany , the Trier Region with its then remaining territory had become one of the then five regions forming the new state of Rhineland - Palatinate , founded in August 1946 . Later , the French occupation government again redeployed some municipalities -- some returned to Allied - occupied Germany , some newly annexed to the protectorate -- between the Saar area and the new state of Rhineland - Palatinate in 1947 and 1949 , before the border was finally fixed . Since 2000 , the employees and assets of the Bezirksregierungen ( i . e . regional administrations ) form the Aufsichts - und Dienstleistungsdirektion Trier ( ADD ; Supervisory and Service Directorate Trier ) and the Struktur - und Genehmigungsdirektionen ( SGD ; Structural and Approval Directorates ) Nord in Koblenz and Süd in Neustadt ( Weinstraße ) . These administrations execute their authority over the whole state , i . e . the ADD Trier oversees all schools . Kreise The Saarland ( German : " das Saarland "  ; - ) is one of the sixteen federal states ( or " Bundesländer ") of Germany . With its capital at Saarbrücken , it has an area of 2 , 570 km² and its population ( as of 30 April ___MASK36___ ) is approximately 1 , 012 , 000 . In terms of both area and population size  apart from the city - states of Berlin , Bremen and Hamburg  it is Germany ' s smallest federal state . The wealth of its coal deposits and their large - scale industrial exploitation , coupled with its location on the border between France and Germany , have given the Saarland a unique history in modern times . The euro ( sign : €; code : EUR ) is the official currency of the eurozone , which consists of ___MASK75___ of the member states of the European Union : Austria , Belgium , Cyprus , Estonia , Finland , France , Germany , Greece , Ireland , Italy , Latvia , Lithuania , Luxembourg , Malta , the Netherlands , Portugal , Slovakia , Slovenia , and Spain . The currency is also officially used by the institutions of the European Union and four other European countries , as well as unilaterally by two others , and is consequently used daily by some 337 million Europeans . Outside of Europe , a number of overseas territories of EU members also use the euro as their currency . Hesse or Hessia (, Hessian dialect : " Hesse " ) is a federal state (" Land ") of the Federal Republic of Germany , with just over six million inhabitants . The state capital is Wiesbaden ; the largest city is Frankfurt am Main . Until the formation of the German Reich in ___MASK65___ , Hesse was an independent country ruled by a Grand Duke ( Grand Duchy of Hesse ). Due to divisions after World War II , the modern federal state does not cover the entire cultural region of Hesse which includes both the State of Hesse and the area known as Rhenish Hesse ( Rheinhessen ) in the neighbouring state of Rhineland - Palatinate . Baden - Württemberg is a state in Germany located in the southwest , east of the Upper Rhine . It is Germany  s third largest state in terms of size and population , with an area of and ___MASK67___ . 8 million inhabitants . The state capital and largest city is Stuttgart . Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in central - western Europe . It includes 16 constituent states , covers an area of , and has a largely temperate seasonal climate . With about 82 million inhabitants , Germany is the most populous member state of the European Union . After the United States , it is the second most popular immigration destination in the world . Germany ' s capital and largest metropolis is Berlin . Other major cities include Hamburg , Munich , Cologne , Frankfurt , Stuttgart and Düsseldorf . The European Union ( EU ) is a political and economic union of member states that are located primarily in Europe . It has an area of , and an estimated population of over 510 million . The EU has developed an internal single market through a standardised system of laws that apply in all member states . EU policies aim to ensure the free movement of people , goods , services , and capital within the internal market , enact legislation in justice and home affairs , and maintain common policies on trade , agriculture , fisheries , and regional development . Within the Schengen Area , passport controls have been abolished . A monetary union was established in ___MASK94___ and came into full force in 2002 , and is composed of 19 EU member states which use the euro currency . Rhineland - Palatinate ( German : " Rheinland - Pfalz ") is one of the 16 states ( German : " Länder ", lit . " countries " however better translated as " state ") of the Federal Republic of Germany . It has an area of and about four million inhabitants . Its state capital is Mainz . Rhineland - Palatinate is located in western Germany and borders Belgium , Luxembourg and France , and the German states of North Rhine - Westphalia , Hesse , Baden - Württemberg and Saarland .