Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: TheWashingtonPost Leonardo da Vinci’s ‘possible’ lost fresco (Photos) 
  
 A Leonardo da Vinci masterpiece may be hidden behind a fresco in Florence’s Palazzo Vecchio, art historians say. 
  
 Da Vinci’s “The Battle of Anghiari” is said to be preserved on a wall behind Giorgio Vasari’s “The Battle of Marciano,” after chemical analysis of probes through the existing mural found paint also used in the “Mona Lisa.” However, the project is controversial — experts are critical of the damage to Vasari’s painting that will occur — and historians say their research is “not conclusive,” according to the BBC. 
  
  
  
 This photo shows an endoscope being thread into the Vasari wall to find signs of the lost Leonardo painting "The Battle of Anghiari" in Florence's Palazzo Vecchio. (DAVE YODER/National Geographic - AFP/GETTY IMAGES) 
  
 Historian Maurizio Seracini of the University of California San Diego suspected that the work was hidden behind the Vasari wall because of a clue that the artist left: A soldier in Vasari’s work holding a small flag that said: “He who seeks, finds.” 
  
 A research team has drilled small holes in the Vasari work and encountered an air cavity. They believe that Vasari bricked a separate wall over the Da Vinci work because he was unwilling to paint directly over it for his own mural. A sample of the paint that came back on the probe was “was similar to black pigment found in brown glazes on Leonardo’s Mona Lisa and St. John the Baptist, identified in a recently published scientific paper by the Louvre, which analysed all the Da Vinci paintings in its collection,” the team said in the Guardian. 
  
 The painting that may be hiding behind the Vasari is an epic scene of a battle on horseback, painted in 1504. The Vasari fresco was painted in 1563. The Da Vinci painting had been admired and copied by the artist’s peers, including Peter Paul Rubens, whose drawing of the scene is in the collection of the Louvre. 
  
  
  
 A view of a banner showing the painting which might be hidden behind the Vasari wall on March 12, 2012, at its location in Florence's Palazzo Vecchio during a press conference. (DARIO THUBURN - AFP/GETTY IMAGES) 
  
  
  
 This picture released by the National Geographic on March 12, 2012, shows the endoscope and sampling tool used to investigate the air gap behind the Vasari mural in Florence's Palazzo Vecchio. (DAVE YODER/National Geographic - AFP/GETTY IMAGES) 
  
  
  
 This picture, released by the National Geographic on March 12, 2012, shows a sampling tool about to be placed into the Vasari wall in Florence's Palazzo Vecchio to extract material for analysis. (DAVE YODER/National Geographic - AFP/GETTY IMAGES) 
  
  
  
 National Geographic Fellow Maurizio Seracini, foreground, and his team viewing footage captured by the endoscope behind the Vasari wall at Palazzo Vecchio. (DAVE YODER/National Geographic - AFP/GETTY IMAGES) ||||| It sounds like the stuff of riveting mystery novels: A team of researchers has spent nearly 40 years searching for a long-lost painting by Leonardo Da Vinci, and may have located it beneath another work that was painted over it. 
  
 The research team, lead by University of California at San Diego professor Maurizio Seracini, announced today that it could be one step closer in its search to find Da Vinci's lost masterpiece "The Battle of Anghiari," which he began painting in 1505 but left unfinished when he left Florence in 1506. 
  
 Seracini's team, which is sponsored by the UCSD and The National Geographic Society, used probes to drill a few small holes in a fresco painted by Giorgio Vasari located in the Piazzo Vecchio's Hall of the 1500s. 
  
 They sampled the chemical content of the paint beneath a small gap behind Vasari's work. Their analysis showed that the chemical composition was similar to that in the paint that Da Vinci used when he painted the "Mona Lisa" and "St. John the Baptist," according to the Associated Press. 
  
 Get a look at the investigators at work. See photos by clicking here. 
  
 Seracini told reporters during a press conference today that the fragments of red, black and beige paint found beneath Vasari's work is consistent with the organic paint Da Vinci used on his frescoes. 
  
 "We have found these very special black pigments...and there are some traces of a red lacquer," he told Eurovision. "The red lacquer is not a pigment usually used on murals, because it would not last, and it is expansive. The red lacquer is used for oil painting. And this element matches with Leonardo's plan to paint his 'Battle of Anghiari' with oil technique." 
  
 "Although we are still in the preliminary stages of the research and there is still a lot of work to be done to solve this mystery, the evidence does suggest that we are searching in the right place," Seracini said. 
  
 Vasari's painting, "Battle Marciano in Val di Chiana," was painted in 1563 in Florence's Piazzo Vecchio when the Hall of the 1500s was being remodeled. Vasari painted several frescoes there and the Da Vinci masterpiece was thought to be destroyed, reported Eurovision. 
  
 But Seracini, when surveying the hall using laser and radar methods, discovered air gaps behind the fresco and suspected that Vasari built a wall in front of Da Vinci's unfinished masterpiece and painted it over with a fresco in order to preserve it. 
  
 Seracini also discovered a telling clue: Vasari included a soldier in the fresco who holds a flag that reads, "He who seeks, finds." 
  
 Seracini, who was featured in Dan Brown's novel "The Da Vinci Code," obtained permission from the city of Florence to drill holes into Vasari's painting, and also has the backing of renowned art restoration institute Opificio delle Pietre Dure. But a number of art historians and experts think his research is bogus. 
  
 Experts Challenge Search for Lost Da Vinci 
  
 Tomaso Montanari, a professor at the University of Naples Federico II, has spearheaded a petition signed by more than 100 art historians who oppose the process, including experts from The Metropolitan Museum of Art in New York and The National Gallery in London. Montanari told ABC News that Serafina's process is not transparent and is based on sensationalism rather than science. "It is just propaganda," he said. 
  
 Moreover, Montanari said that the paint beneath Vasari's fresco could be ornamental decoration, or paint used by other artists in Florence during the same time period. And because of Da Vinci's experimental painting technique, it's unlikely that "The Battle of Anghiari" would be preserved for so long. 
  
 Florence Mayor Matteo Renzi told reporters they may decide to remove parts of the Vasari work which were restored in the 19th and 20th centuries in order to look behind them. 
  
 "We are sure that the 'Battle of Anghiari' is behind" Vasari's work, he told the Associated Press. |||||
Output:
Indefatigable art experts believed they've discovered the location of a long-sought Leonardo Da Vinci masterpiece hidden behind another painting in Florence. A California team searching for the masterpiece Battle of Anghiari are convinced it's painted on a wall of the Palazzo Vecchio—behind another painting by Giorgio Vasari. They sampled the chemical content of the red, black and beige paint beneath Vasari's fresco, and discovered it matched the paint used on the Mona Lisa and Da Vinci's St. John the Baptist, reports ABC News. An unusual red lacquer typically used for oil painting is also consistent with Da Vinci's plan to do his battle painting in oil, notes researcher Maurizio Seracini, a professor at UC-San Diego. Though much work remains to be done, "the evidence suggests we are searching in the right place," he said. Other experts are not so convinced, reports the Washington Post, and call Seracini's claims "propaganda," though the mayor of Florence is certain the painting is hidden behind Vasari's. Da Vinci began painting Battle on Anghiari in 1505, but stopped a year later when he left Florence. Vasari's Battle Marciano in Val di Chiana was painted in 1563 in the Palazzo Vecchio when the Hall of the 1500s was being remodeled. Da Vinci's painting was thought to be destroyed then. But Seracini discovered spaces behind Vasari's painting, and began to suspect that the Da Vinci was still on the real wall underneath a kind of false front made for the newer fresco. Vasari himself may have left a tantalizing clue. One of his painted soldiers holds a flag reading: "He who seeks, finds."