Question: Frans Luycx became the leading portrait painter to which Emperor?
Sentence (from "Godfrey Kneller"): Sir Godfrey Kneller, 1st Baronet (born Gottfried Kniller; 8 August 1646 – 19 October 1723) was the leading portrait painter in England during the late 17th and early 18th centuries, and was court painter to English and British monarchs from Charles II to George I.
Relevant evidence: No