Researchers think they 've found da Vinci 's 's `` Mona Lisa '' Pigment found on a hidden wall match `` The Battle of Anghiari '' paint , they say . The mayor of Florence wants the Florence government to approve more study . The wall is in the Hall of the 500 of the Palazzo Vecchio , the seat of Italian government .
Researchers think they 've found Leonardo 's `` The Battle of Anghiari '' Pigment found on a hidden wall match `` Mona Lisa '' paint , they say . The mayor of Florence wants the Italian government to approve more study . The wall is in the Hall of the 500 of the Palazzo Vecchio , the seat of Florence government .