The national flag of Germany is a tricolour consisting of three equal horizontal bands displaying the national colours of Germany: black, red, and gold (German: Schwarz-Rot-Gold). The flag was first sighted in 1848 in the German Confederation. The flag was also used by the German Empire from 1848 to 1849. It was officially adopted as the national flag of the German Reich (during the period of the Weimar Republic) from 1919 to 1933, and has been in use since its reintroduction in the Federal Republic of Germany in 1949.

Since the mid-19th century, Germany has had two competing traditions of national colours, black-red-gold and black-white-red. Black-red-gold were the colours of the 1848–1849 Revolutions, the Weimar Republic of 1919–1933 and the Federal Republic (since 1949). They were also adopted by the German Democratic Republic (1949–1990). Wikipedia