The Portrait of Prince Maurits (SK-A-2100) is a small-scale copy of Van Mierevelt’s 1607 painting in Delft,2 of which there are many versions.3 According to a note at the Iconographisch Bureau, the Portrait of Frederik Hendrik (shown here) is a copy of a 1612 painting by Jan van Ravesteyn.4 Van Ravesteyn’s portrait is almost identical to the one made by Van Mierevelt in 1610, which is only known today through studio replicas and copies.5 Lyon’s copy showing Frederik Hendrik shares with Van Ravesteyn’s portrait the somewhat less voluminous lace ruff. Copies after Van Mierevelt’s 1607 Portrait of Prince Maurits and his 1610 Portrait of Frederik Hendrik in the collection of the Mauritshuis belong to a series of six copies after portraits by Van Mierevelt of members of the House of Orange.6 The present two copies by Lyon (see SK-A-2100) might also have been conceived as part of such a series. Jonathan Bikker, 2007 See Bibliography and Rijksmuseum painting catalogues See Key to abbreviations and Acknowledgements This entry was published in J. Bikker (ed.), Dutch Paintings of the Seventeenth Century in the Rijksmuseum Amsterdam, I: Artists Born between 1570 and 1600, coll. cat. Amsterdam 2007, no. 172.