The Horst-Wessel-Lied ("Horst Wessel Song"), also known as Die Fahne hoch ("The flag on high", from its opening line), was the anthem of the from 1930 to 1945. From 1933 to 1945 it was also the co-national anthem of . 
The lyrics of the song were composed in 1929 by , a Nazi activist and local commander of the Nazi militia, the , in the Berlin district of . Wessel was assassinated by a activist in January 1930, and the propaganda apparatus of Berlin Dr made him the leading martyr of the Nazi Movement. The song became the official  Song of Consecration (Weihelied) for the Nazi Party, and was extensively used at party functions as well as being sung by the SA during street parades.
When the Nazis came to power in 1933, the Horst-Wessel-Lied was recognised as a national symbol by a law issued on , . Nazi Germany thus had a double anthem, consisting of the first verse of the Deutschlandlied followed by the Horst Wessel-Lied. A regulation attached to a printed version of the Horst Wessel-Lied in 1934 required the right arm to be raised in a "" when the first and fourth verses were sung. Top Nazi leaders can be seen singing the song at the finale of 's 1935 film Triumph of the Will.
With the fall of the Nazi regime in 1945, the Horst-Wessel-Lied was banned, and both the lyrics and the tune remain illegal in Germany and Austria to this day except for educational and scholarly uses (under sections 86 and 86a of the Strafgesetzbuch (Germany)).