Palazzo VecchioÕs grand ceremonial chamber, the Hall of 500. At right, Vasari's fresco 'The Battle of Marciano', where Leonardo Da Vinci's 'The Battle of Anghiari' should be hidden behind. Italian art expert Mauricio Seracini says he is on the verge of discovering a long-lost Leonardo da Vinci masterpiece, 'The Battle of Anghiari' hidden in a secret cavity behind a palace wall in Florence, Italy on October 30, 2009. Photo by Eric Vandeville/ABACAPRESS.COM