The "Winery Zweifel & Co. AG" in Zurich-Höngg in the Swiss canton Zurich was founded in 1898 by Emil and Paul Zweifel with the aim of winegrowing and wine trade, as well as to produce fruit juice. However, the traditional family has been associated with viticulture since 1351. Today the company is headed by Walter and Maja Zweifel. It is subdivided into the "Domaine Z" (the winery), a wine trade with well-known producers from Europe and overseas (partly as general representation) and a wine astronomy. The estate includes vineyards in the urban areas of Klingen and Riedhof, on the Lattenberg in Stäfa on Lake Zurich, as well as in Regensberg and Remigen in the neighboring canton Aargau, The Zurich wines are made from the white varieties Riesling x Sylvaner ( Müller-Thurgau ) Chardonnay. Sauvignon Blanc. Gewurztraminer and the autochthonous Räuschling, as well as the red wines Pinot Noir. Merlot. Syrah vinified. On behalf of the City of Zurich is exclusively produced by Zweifel the named after a Lage Zurich city wine "Chillesteig" from Riesling x Sylvaner. In Regensberg in the canton Aargau is next to wines from Pinot Noir and Riesling x Sylvaner also one Biowein from the varieties regent. Maréchal Foch. Léon Millot and Garanoir produced.