Question: When were Picassos best works made?
About the article "Dora Maar au Chat", section "Descriptions of painting".

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The Beyeler Foundation opened its doors on October 18, 1997, presenting 140 works of modern classics, including 23 Picassos.
The overall collection of 200 works of classic modernism reflect the views of Hildy and Ernst Beyeler on 20th-century art and highlight features typical of the period from Claude Monet, Paul Cézanne and Vincent van Gogh to Pablo Picasso, Andy Warhol, Roy Lichtenstein and Francis Bacon.
The paintings appear alongside some 25 objects of tribal art from Africa, Oceania and Alaska.
A third of the exhibition space is reserved for special exhibitions staged to complement the permanent collection.
The culmination of Beyeler's career came in 2007 when all the works that passed through his hands were reunited at the museum for a grand exhibition that included van Gogh's 1889 "Portrait of Postman Roulin," Lichtenstein's "Plus and Minus III" and a huge expressive drip painting by Jackson Pollock.
The collection is expanding, particularly in terms of works made after 1950 (recent acquisitions include pieces by Louise Bourgeois and Wolfgang Tillmans). 
Both Valentino and Giancarlo Giammetti are renowned for their extensive collection of art spread throughout their homes around the world including works by Picasso, Cy Twombly, Balthus, and Damien Hirst.
In the 1980s they became close friends (and clients) of Thomas Ammann, with whom they shared their passion for Warhol and Twombly especially, "...it was Thomas Ammann who taught us to love art...".
Valentino and Giammetti's lifestyle has been considered flamboyant.
John Fairchild, editor-at-large at "Women's Wear Daily" and "W", told "Vanity Fair",  Valentino and Giancarlo are the kings of high living.
Every other designer looks and says, ‘How do they live the way they do?’ I don’t think they made the money that Valentino and Giancarlo did, because Giancarlo knows how to make money.
If they did, they didn’t spend the money like Valentino.
No other designer ever did.
When the terrorism first started in Rome – the period when the Red Brigades were kidnapping people – Valentino was riding around in a bulletproof Mercedes.
And do you know what color the Mercedes was?
Red.
My God, I thought, you must want to get blown up.
Valentino owns multiple villas and apartments around the world, all filled with art: Palazzo Gabrielli-Mignanelli near the Spanish steps in Rome and a villa on the Via Appia Antica, a major historical landmark of Rome, and Chalet Gifferhorn in Gstaad, Switzerland.
In France, is the Chateau de Wideville, a castle on in Davron, about 30 minutes outside Paris, which Valentino bought in 1998 and had meticulously restored by the late Henri Samuel, the dean of French interior design.
The castle had been previously decorated by the late Renzo Mongiardino, the greatest of the Italian decorators, who also worked on Valentino's Roman villa and Giammetti's Tuscan house.
Built circa 1600, the castle was once the home of Claude de Bullion, the finance minister for Louis XIII, who slept at Wideville, according to a plaque in the castle, on January 22, 1634.
During the reign of Louis XIV, Madame de la Valliere, one of his mistresses, lived at Wideville.
Her bedroom, a mirrored-walled chapel with a -high ceiling, was converted into a bathroom.
Valentino also has an apartment near the Frick Museum overlooking Central Park in New York City, as well as one of the largest private houses in London's Holland Park, a 19th-century mansion whose centerpiece is the grand salon, featuring five late Picassos.
The breakfast room is lined with 200 Meissen porcelain plates, and the small salon has two Basquiat paintings and a painting by Damien Hirst.
His villa on the cliffs of Capri has recently been sold.
Valentino also spends much time on "T. M. Blue One", his yacht boasting a full-time staff of eleven, and a selection of art ranging from Picassos to Andy Warhols.
He frequently visits Giancarlo Giammetti's residences: the penthouses in Via Condotti in Rome and on the Quai D'Orsay in Paris, or the country estate in Cetona, Tuscany. 
On 20 June 2010, 611 C3 Picassos built between January and March 2010 were recalled due to incorrectly routed fuel pipes, which were believed to have been in contact with the heat shield.
This fault may have caused chafing and may lead to a fuel leak.
The models were built between January and March 2010 and were sold in the UK.
On 24 August 2010, all 13,234 Picassos sold in the UK were recalled because the windscreen trim could deteriorate, and could eventually detach, leading to a loose-fitting windscreen.
In May 2011, all 24,091 C3 Picassos in the UK were recalled for a safety modification, following complaints and an investigation by BBC consumer affairs programme "Watchdog" into brakes that could be activated on the passenger side of the right-hand drive vehicles.
The problem occurred because of the way the vehicles were modified for right-hand-drive.
The investigation showed that although the brake pedal had been moved to the right, it was still connected to a mechanism on the passenger side.
This was covered by felt carpet and meant that both the front passenger and driver could activate the brakes.
A further investigation by "Watchdog" later found the same problem in other Citroën models and some vehicles produced by Renault and Peugeot, some of which were registered in 2002.
All three manufacturers worked with the Vehicle and Operator Services Agency (VOSA) to identify the severity of the problem but no vehicles were found to be affected enough to issue recalls.8,815 Picassos built between January and May 2011 for the UK market were recalled on 2 September 2011 when it was discovered that the battery cable was too short and could cause gearbox failures and in turn stall the engine.
The faulty earth return cable was replaced.
Despite the recalls, the vehicle continued to sell well in the UK and has won numerous awards. 
Fletcher Jones began purchasing art, particularly works by the French Impressionists.
He owned paintings by Edgar Degas, Claude Monet, Pierre Bonnard, Camille Pissarro.
As well, he acquired four Picassos, notably his 1901 self-portrait titled "Yo, Picasso" that was sold by Jones's estate and which, in 1989, would be purchased by the Greek shipping magnate, Stavros Niarchos for US$47.85 million.
On November 7, 1972, the forty-one year-old Jones died when the plane he was piloting home crashed into a hillside.
He is buried in the Oak Hill Cemetery in the Santa Ynez Valley.
Jones had divorced his wife in the early 1960s and his estate provided a trust fund for his two sons, Jeffery and Scott, but the bulk of his fortune went to his Fletcher Jones Foundation.
After Jones death, the actress Sherry Jackson unsuccessfully sued his estate for palimony.
Jones' art collection was liquidated by his estate as well as Westerly Stud Farms.
Although he was never a philanthropist in life, his Foundation continues to operate and has made considerable donations, primarily to California colleges and universities. 
Picasso painted several portraits of his lover Dora Maar in which her face is distorted in a manner similar to Lichtenstein's painting.
Such portraits were an expressionist development of the fragmented forms of his earlier Cubist works.
A 1941 Picasso of Maar entitled "Dora Maar au Chat" sold at auction for $95,216,000 in 2006.
Lichtenstein specifically used the 1939-40 portrait of Maar in the Morton G. Neumann Family Collection as the template for "Woman with Flowered Hat".
Neumann himself had sent a reproduction of the portrait to Lichtenstein after seeing one of Lichtenstein's earlier reworkings of a Picasso painting.
Lichtenstein painted "Woman with Flowered Hat" when he was pastiching various types of sources, including commercial illustrations, comic imagery and modernist masterpieces.
The masterpieces represented what could have been dubbed the "canon" of art and was thought of as "high art," while the "low-art" subject matter included comic strip images.
His masterworks sources included the likes of Cézanne, Mondrian and Picasso.
During this time in his career, Lichtenstein noted that "the things that I have apparently parodied I actually admire."
The painting is one of four variations on Picassos that Lichtenstein created during 1962 and 1963.