White wine the death knell of northern viticulture. The vine disappeared from northern Germany and Baden, and the maximum altitude for viticulture descended to 220 metres. Hans-Jürgen Otto noted that: "all the vineyards suffered and decreased in area". In England the vine also disappeared. The less early vineyards preferred to select white varieties of grapes because, even if unripe, white grapes allowed wine that was a little sour to still be consumable, while red grapes do not give enough colour and green tannins make the wine bitter. The interruption of the fermentation by a cold winter led to the discovery of the
Königsberg Colour-head Tumbler Königsberg Colour-head Tumbler The Königsberg Colour-head Tumbler () is a breed of fancy pigeon developed in the mid-18th century in Königsberg, East Prussia, from which it gets its German name. This breed of pigeon is well known in Russia because Königsberg is now a part of Russia, and is known as Kaliningrad. The Königsberg Colour-head comes in the colours black, red, white, yellow, and blue. Their rudders and heads can be of any of the above colours. Conformance standards for this breed require perfect body posture and high carriage. They are mostly kept as fancy (show) pigeons, but with regular