Before it was called Germany, it was called Germania. In the years A.D. 900 – 1806, Germany was part of the Holy Roman Empire. From 1949 to 1990, Germany was made up of two countries called the Federal Republic of Germany (inf. West Germany) and the German Democratic Republic (inf. East Germany). During this time, the capital city of Berlin was divided into a west and an east part. On 13 August 1961, East Germany started building the Berlin Wall between the two parts of Berlin. West Germany was one of the countries that started the European Union.