Who was the responsible for the restoration of monalisa 1809?

The restoration of The Mona Lisa in 1809 was conducted by the French artist and restorer Jean-Baptiste Marie Pierre. He undertook this work during the painting's time in the collection of Napoleon Bonaparte, who had taken it to Paris. Pierre's restoration aimed to enhance the painting's colors and condition, although it has since been noted that such restorations can sometimes alter the original artwork.