File:Hans Holbein the Younger - Portrait Miniature of Katherine Howard (Strawberry Hill).jpg

English: One of two extant portrait miniatures of this sitter by Hans Holbein the Younger, the other in the Royal Collection (ref. RCIN 422293), this miniature was formerly in the collection of Horace Walpole at Strawberry Hill. Foister records a reference to a third miniature listed as of Katherine Howard by Holbein, sold from the collection of the artist Pieter Stevens of Antwerp in 1668 and unassociated with either of the surviving two miniatures.

There is no undisputed contemporary likeness of Katherine Howard. The most compelling argument in favour of the lady's regal status is that the large ruby, emerald and pearl jewel that she wears is similar to that shown in Holbein's portrait of Jane Seymour at the Kunsthistorisches Museum, Vienna, (ref. 881) and identical to that shown in the portrait of Henry VIII’s third queen, at the Mauritshuis, The Hague, (ref. 278). This pendant jewel and her carcanet (necklace) of pearls and rubies set in goldsmith’s work, may have been given to Katherine Howard by Henry VIII on their marriage in 1540. The double-looped necklace closely resembles those seen in portraits of Henry VIII’s other wives, including Jane Seymour (Kunsthistorisches Museum) and is identical to that of Catherine Parr in the Hastings portrait, National Trust (ref. NT 1276906).
Katherine Howard, daughter of Lord Edmund Howard and niece of Thomas Howard, third Duke of Norfolk, became the fifth wife of Henry VIII on 28 July 1540. She was beheaded for adultery on 13 February 1542. If she is the subject of the miniature, it must date from the short period of her ascendancy and reign as queen c.1540.

References

• Edwards, John Stephan. (2015) A Queen of New Invention: Portraits of Lady Jane Grey Dudley, England’s ‘Nine Days Queen’. Palm Springs: Old John Publishing. ISBN 9780986387302, p. 32.: "The necklace, though with a different pendant, can be seen in both the full-sized portrait of Jane Seymour, Henry's third consort, and in the miniature thought to depict Henry's fifth wife, Katherine Howard".
  
• Heard, Kate & Whitaker, Lucy (2013). The Northern Renaissance: Dürer to Holbein. London: Royal Collection Publications. ISBN 9781905686827, p. 183.
  
• Reynolds, Graham. (1999). The Sixteenth and Seventeenth–Century Miniatures in the Collection of Her Majesty the Queen. London: The Royal Collection. ISBN 1902163451, pp. 50–52.: Rejects the suggestion that the sitter is either Lady Monteagle or Margaret Douglas, noting that "comparison in each case does not support the hypothesis."
  
• Strong, Roy (1983). Artists of the Tudor Court: The Portrait Miniature Rediscovered, 1520–1620. Catalogue of an exhibition held at the Victoria & Albert Museum, 9 July–6 November 1983. London: Victoria & Albert Museum. ISBN 0905209346, p. 50: "Research on Tudor miniatures before c. 1570 indicates a sitter of exceptional importance, as duplicates in the case of women exist only as Henry VIII's queens."