Unfortunately, nowadays they are often only monuments to a long tradition of craftsmanship: the heavy millstones were moved using the power of the wind alone to grind grains into flour (grain mills) or press oil from olives (oil mills). Sometimes - although rarely - the windmills also had the function of a pumping station and transported water to a higher level.
But Miguel de CERVANTES (1547 to 1616) also created a literary monument to the technical monument of the mills: the most famous figure of the author, who is considered Spain's national poet and whose work can certainly be valued as world literature: "Don QUIXOTE", also known as the "Knight of the Sorrowful Countenance" and always accompanied by his loyal squire Sancho Panza, fights a - of course hopeless - battle against windmills in one of the fictional stories, in which he believes he recognizes four-armed giants.