This is one of the series of forty-nine portrait miniatures (420431-420679; Royal Collection) of German and other forebears of the Hanoverian dynasty which were first recorded hanging in Queen Caroline's Closet at Kensington Palace by George Vertue in 1743. The series can be dated fairly narrowly by internal evidence to the years between 1593-7 and appears to be the work of a single as yet unidentified miniature painter who worked mainly at the Brunswick-Lüneburg court but also visited Brandenburg and other centres. The artist was a naïve successor to the tradition of German court portraiture established by Lucas Cranach the Elder (1472-1553) at the court of the Elector of Saxony at Wittenberg. The present miniature can be dated prior to 1599, since the sitter is not described with her married title. Margareta, sixth daughter of William the Younger, Duke of Brunswick-Lüneburg (see 420439) married in 1599, as his second wife, John Casimir, Duke of Saxe-Coburg. Inscribed at the top in white: FREWLIN MARGREDA GEBORNE HERZOGIN ZU BRAUNS UND LUNEB.