This is the final miniature of Charles I in a series by Peter Oliver in the Royal Collection spanning a period of approximately eight years from c. 1620 onwards. As a work of Peter Oliver's artistic maturity, it displays the more naturalistic and painterly style which he had developed under the influence of artists at court such Daniel Mytens. It also serves as a bridge to the work of the miniaturist John Hoskins (c. 1590-1665) whose early miniatures demonstrate an affinity with works such as this one by Peter Oliver. The miniature is undated, but the the king's youthful appearance is close to that in Mytens's portrait of the king after his accession dating from 1628 (404448; Royal Collection). Peter Oliver was trained as a miniaturist by his father, Isaac Oliver. As well as painting portrait miniatures, he copied Old Master paintings in miniature; eight of these 'Histories in Lymning' remain in the Royal Collection.