Germany - choose a jigsaw puzzle to solve

Germany (German: Deutschland [ˈdɔʏtʃlant]), officially the Federal Republic of Germany (German: Bundesrepublik Deutschland, listen ), is a federal parliamentary republic in central-western Europe . It includes 16 constituent states, covers an area of 357,021 square kilometres (137,847 sq mi), and has a largely temperate seasonal climate . With about 82 million inhabitants, Germany is the most populous member state of the European Union . Germany's capital and largest metropolis is Berlin , while its largest conurbation is the Ruhr, with its main centres of Dortmund and Essen . The country 's other major cities are Hamburg , Munich , Cologne , Frankfurt , Stuttgart , Düsseldorf , Leipzig , Bremen , Dresden , Hannover, and Nuremberg . Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before 100 AD. During the Migration Period, the Germanic tribes expanded southward. Beginning in the 10th century, German territories formed a central part of the Holy Roman Empire . During the 16th century , northern German regions became the centre of the Protestant Reformation . After the collapse of the Holy Roman Empire , the German Confederation was formed in 1815.