Spanish wine person a year. The country has an abundance of native grape varieties, with over 400 varieties planted throughout Spain though 80 percent of the country's wine production is from only 20 grapes—including the reds Tempranillo, Garnacha, and Monastrell; the whites Albariño from Galicia, Palomino, Airen, and Macabeo; and the three cava grapes Parellada, Xarel·lo, and Macabeo. Major Spanish wine regions include the Rioja and Ribera del Duero, which are known for their Tempranillo production; Valdepeñas, drunk by Unamuno and Hemingway, known for high quality tempranillo at low prices; Jerez de la Frontera, the home of the fortified wine Sherry; Rías
History of manifolds and varieties spaces with a differentiable or topological structure, while "variety" refers to spaces with an algebraic structure, as in algebraic varieties. In Romance languages, manifold is translated as "variety" – such spaces with a differentiable structure are literally translated as "analytic varieties", while spaces with an algebraic structure are called "algebraic varieties". Thus for example, the french word "" means topological manifold. In the same vein, the Japanese word "" (tayōtai) also encompasses both manifold and variety. ("" (tayō) means various.) Ancestral to the modern concept of a manifold were several important results of 18th and 19th century mathematics. The oldest