1. The Schengen Agreement led to the creation of Europe's Schengen Area in which internal border checks have largely been abolished. It was signed on the Moselle River, onboard the Princesse Marie-Astrid passenger boat, at the town of Schengen, Luxembourg, on 14 June 1985. The agreement facilitates one of the central tenets of the EU. That of the freedom of movement of goods and people.

2. The Walhalla is a hall of fame that honors laudable and distinguished people in German history – "politicians, sovereigns, scientists and artists of the German tongue"; thus the celebrities honored are drawn from Greater Germany, a wider area than today's Germany, and even as far away as Britain in the case of several Anglo-Saxons who are honored. The hall is a neo-classical building above the Danube River, east of Regensburg in Bavaria.

3. In Norse mythology, Valhalla is a majestic, enormous hall located in Asgard, ruled over by the god Odin. Chosen by Odin, half of those who die in combat travel to Valhalla upon death, led by valkyries, while the other half go to the goddess Freyja's field Fólkvangr. In Valhalla, the dead join the masses of those who have died in combat known as Einherjar and various legendary Germanic heroes and kings, as they prepare to aid Odin during the events of Ragnarök. Before the hall stands the golden tree Glasir, and the hall's ceiling is thatched with golden shields. Various creatures live around Valhalla, such as the stag Eikþyrnir and the goat Heiðrún, both described as standing atop Valhalla and consuming the foliage of the tree Læraðr.

4. For the opening the Walhalla Memorial in 1842, Joseph Hartmann Stuntz authored a poem about Germany's greatness which was set to music.