An eternal flame is a flame, lamp or torch that burns for an indefinite time. Most eternal flames are ignited and tended intentionally, but some are natural phenomena caused by natural gas leaks, peat fires and coal seam fires, all of which can be initially ignited by lightning, piezoelectricity or human activity, some of which have burned for hundreds or thousands of years.

The Neue Wache is a listed building on Unter den Linden boulevard in the historic centre of Berlin, Germany. Erected from 1816 to 1818 according to plans by Karl Friedrich Schinkel as a guardhouse for the Royal Palace and a memorial to the Liberation Wars, it is considered a major work of Prussian Neoclassical architecture. A Victoria pedimental sculpture by Johann Gottfried Schadow and five General statues by Christian Daniel Rauch, referring to the Warrior statues on Schlossbrücke, also belong to the ensemble. Since 1993, the Neue Wache has been home to the Central Memorial of the Federal Republic of Germany to the Victims of War and Tyranny.