The red grape variety originates from Germany. Synonyms include Blue Franconian grape, Blue Hartweg grape, Blue Hanging grape, Corthum, Corthum grape, Franconian grape, Grobroter, Hartweg grape, Häusler, Karmazin, Karmazyn, Sour Black, Sweet Red, Vicsanka, and Viesanka. According to DNA analyses conducted in 2021, it is likely a natural cross between Gouais Blanc (White Heunisch) x unknown father variety (an earlier DNA analysis indicated Sweet Black as the father variety, which has not been confirmed by further analyses). It may be identical to the variety Blue Hanging grape. The Tauberschwarz variety has been recognized by the Slow Food association as a "passenger" of the "Ark of Taste." It belongs to the excellent foods that are worth protecting and preserving from the threats of industrial agriculture and the food industry.
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