Protos, a Greek word that means "first", was, in effect, the first winery to produce what 50 years later would be the Denomination of Origin Ribera del Duero. In recent times, and like other wineries in the area, found in Rueda the ideal place to make a white wine (not allowed in the D.O. Ribera del Duero) and chose La Seca (Valladolid), known as "the cradle of Verdejo."

It is one of the few wineries of the Denomination that elaborate rose, since most of the wineries turn into the production of red wines. After the harvest, bunches of grapes are stripped (separate the berries of the raspon or woody part of the cluster) and crushed to stay macerated with the mosto 16 hours, this maceration gives it its beautiful color and allows extracting all the aromas of the skins.