Detail of Vasari's fresco 'The Battle of Marciano' in the hall of the Five-Hundred (Cinquecento) at Palazzo Vecchio; Florence;Italy.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 wall of the Palazzo Vecchio in Florence; Italy. October 30;2009. He claims a cryptic message in Vasari's fresco 'The Battle of Marciano' in Florence's Palazzo Vecchio suggests the lost Leonardo is hidden behind. Seracini thinks Vasari left a clue by depicting a soldier who waves a green flag with the words 'Cerca Trova'; seek and you will find. Photo by Eric Vandeville/akg-images