Drawings by Pieter Coecke van Aelst
Juan III of Portugal and Catherine of Austria with St John the Baptist and St Catherine of Alexandria
1541-1542, Pieter Coecke van Aelst
Pieter Coecke van Aelst or Pieter Coeck or Aalst (August 4, 1502, Aalst, Belgium - December 6, 1550, Brussels, Belgium) is a Flemish painter and architect-designer, known for his edition of Vitruvius in Dutch.