Complex sentence: Jan Thomas van Ieperen (5 February 1617--6 September 1673) was a Flemish Baroque painter and engraver active in Antwerp and at the Habsburg court in Vienna where he painted a portrait of Holy Roman Emperor Leopold I in theatrical costume.
Split into simpler sentences: Jan Thomas van Ieperen (5 February 1617--6 September 1673) was a Flemish Baroque painter and engraver active in Antwerp and at the Habsburg court in Vienna. He painted a portrait of Holy Roman Emperor Leopold I in theatrical costume.