(Decanter) - North German bottlers of one of Europe's oldest - and oddest - wine names are calling on the appellation authorities to beef up its legal protection. There is a mini-boom in so called ‘Rotspon’, a Medieval term describing a French red wine imported in bulk and bottled and aged within the city limits of Hamburg, Lüneberg or Lübeck. The fact that the wine is aged in the damp and cool climate of northern Germany is supposed to give it special qualities and longevity. Napoleon is said to have been impressed with the quality of the wines he found in the region when he marched through in 1806.