Question: how much did wheatfield with cypresses cost in 1993?
About the article "Vincent van Gogh", section "Posthumous fame".

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A Wheatfield with Cypresses (occasionally called "A Cornfield with Cypresses") is any of three similar 1889 oil paintings by Vincent van Gogh, as part of his wheat field series.
All were executed at the Saint-Paul-de-Mausole mental asylum at Saint-Rémy near Arles, France, where Van Gogh was voluntarily a patient from May 1889 to May 1890.
The works were inspired by the view from the window at the asylum towards the Les Alpilles mountains.
The painting depicts golden fields of ripe wheat, a dark fastigate Provençale cypress towering like a green obelisk to the right and lighter green olive trees in the middle distance, with hills and mountains visible behind, and white clouds swirling in an azure sky above.
The first version (F717) was painted in late June or early July 1889, during a period of frantic painting and shortly after Van Gogh completed "The Starry Night", at a time when he was fascinated by the cypress.
It is likely to have been painted "en plein air", near the subject, when Van Gogh was able to leave the precincts of the asylum.
Van Gogh regarded this work as one of his best summer paintings.
In a letter to his brother, Theo, written on 2 July 1889, Vincent described the painting: "I have a canvas of cypresses with some ears of wheat, some poppies, a blue sky like a piece of Scotch plaid; the former painted with a thick impasto like the Monticellis, and the wheat field in the sun, which represents the extreme heat, very thick too."
Van Gogh suffered a bout of severe mental illness in late July and early August, but was able to resume painting in late August and early September 1889.
After making a reed-pen drawing of the work, now held by the Van Gogh Museum in Amsterdam, he copied the composition twice in oils in his studio, one approximately the same size (F615) and a smaller version (F743).
The larger studio version was probably painted in a single sitting, with a few minor later adjustments adding touches of yellow and brown.
Van Gogh sketched out the design with charcoal underdrawing; he applied thin paint on the cypress trees and sky, with the ground allowed to show in places, and thick impasto for the foreground wheat and the clouds above.
Characteristically, he preferred the brilliant white of zinc white (zinc oxide) rather than lead white, despite its poor drying qualities, with his palette also including cobalt blue, shades of chrome yellow, viridian and emerald green, and touches of vermilion and synthetic ultramarine.
The July "plein air" version was much more heavily worked, and may be considered a study for the more considered September studio painting.
He sent the smaller and less accomplished studio version to his mother and sister as a gift.
Vincent sent the larger July and September versions to his brother in Paris later in September 1889.
The July version was sold by Theo's widow in 1900 to artist Émile Schuffenecker.
It passed through the hands of collector Alexandre Berthier and art dealer Paul Cassirer in Paris, where it was first exhibited and photographed at Galerie Eugène Druet in November 1909.
It was sold to banker Franz von Mendelssohn (1865–1935) in Berlin in 1910 and remained with the Mendelssohn family in Germany and Switzerland until it was sold to industrialist Emil Bührle in Zurich in 1952.
His son, Dieter Bührle, sold the painting in 1993 to the Metropolitan Museum of Art in New York for $57 million using funds donated by publisher, diplomat and philanthropist Walter Annenberg.
The National Gallery in London holds a similar version painted in Van Gogh's studio in September 1889, bought with the Courtauld Fund in 1923.
It is unlined, and was never varnished or waxed.
The third smaller version is held by a private collection (sold at Sotheby's in London in 1970; in the US in 1987).  
Wheatfield Township was organized in 1841. 
The Kanakee Valley School Corporation serves Wheatfield.
Wheatfield Elementary School is located in and serves Wheatfield.
Kankakee Valley Intermediate School, Kankakee Valley Middle School, and Kankakee Valley High School are located in Wheatfield Township and serve Wheatfield. 
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Posthumous fame.
Following his first exhibitions in the late 1880s, Van Gogh's fame grew steadily among colleagues, art critics, dealers and collectors.
After his death, memorial exhibitions were mounted in Brussels, Paris, The Hague and Antwerp.
In the early 20th century, there were retrospectives in Paris (1901 and 1905), and Amsterdam (1905), and important group exhibitions in Cologne (1912), New York (1913) and Berlin (1914).
These had a noticeable impact on later generations of artists.
By the mid 20th century Van Gogh was seen as one of the greatest and most recognizable painters in history.
In 2007 a group of Dutch historians compiled the "Canon of Dutch History" to be taught in schools and included Van Gogh as one of the fifty topics of the canon, alongside other national icons such as Rembrandt and De Stijl.
Together with those of Pablo Picasso, Van Gogh's works are among the world's most expensive paintings ever sold, based on data from auctions and private sales.
Those sold for over US$100 million (today's equivalent) include Portrait of Dr. Gachet, Portrait of Joseph Roulin and Irises.
A Wheatfield with Cypresses was sold in 1993 for US$57 million, a spectacularly high price at the time, while his Self Portrait with Bandaged Ear was sold privately in the late 1990s for an estimated US$80/$90 million.
A newly discovered painting by the Dutch artist was publicly unveiled on September 10, 2013, after it was retrieved from the attic of a Norwegian collector who misjudged the work as a fraud following its purchase in 1908.
"Sunset at Montmajour" is a large oil landscape painting and, as of September 24, 2013, is displayed at Amsterdam's Van Gogh Museum.