The portrait depicts Carlo Emanuele I, Duke of Savoy from 1580 to 1630, wearing one of his precious armor and the Annunziata collar. As stated by the signature at the bottom left, it is the work of one of the rare and most acclaimed painters of the seventeenth century, Giovanna Garzoni (1600-1670) from Ascoli. Called to Turin by Christina of France, she worked there from 1632 to 1637. In the Royal Palace the parchment with Carlo Emanuele I is the counterpart to the one depicting his father Emanuele Filiberto, while in the Uffizi there are the portraits of his wife Caterina Micaela and his son. Vittorio Amedeo I. The painting, with its extremely refined design and pictorial technique, stands out for its remarkable naturalism despite having been made a few years after the death of the Duke depicted. The painter must have taken up one or more portraits previously made by other authors, such as Giovanni Caracca, but reaching a much higher result, which justifies the success obtained in Florence and Rome after her stay in Turin.