Frans Luycx became the leading portrait painter to which Emperor?
Frans Luycx: Frans Luycx or Frans Luyckx (before 17 April 1604 – 1 May 1668) was a Flemish painter who became the leading portrait painter at the imperial court of Emperor Ferdinand III in Vienna. Ferdinand III, Holy Roman Emperor: Ferdinand III (13 July 1608 – 2 April 1657) was Holy Roman Emperor from 15 February 1637 until his death, as well as King of Hungary and Croatia, King of Bohemia and Archduke of Austria.
Ferdinand III