single vineyard in the municipality of Hattenheim in the German wine-growing region of Rheingau. The name is derived from the day's work or the possible amount of work a man could do. According to a document, the site, then called "Mannwerk", was given as a fief to Johann Freiherr Langwert von Simmern on 27 January 1464 in gratitude for services as chancellor to the Duke of Pfalz-Zweibrücken. This was the beginning of a more than 500-year-old wine-growing tradition of this family. The south-facing vineyard at an altitude of 80 to 120 metres above sea level with a slope of 18 to 27% covers eight hectares of vines. The deep, chalky loess soil has a good water storage capacity due to underground water veins and thus guarantees a good supply even in dry years. The Riesling variety is cultivated here. Shares in the vineyard are held, for example, by the Freiherr Langwerth von Simmern and Hessische Staatsweingüter w ineries.
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