a Flemish painter, draughtsman and engraver who contributed to the development of marine art and landscape painting in Flanders. In 1634 Gillis became together with his brother Bonaventura a master in the Antwerp Guild of Saint Luke. Initially the two brothers shared a studio in Antwerp until in 1641 Bonaventura moved to Hoboken (Antwerp) where he worked in a studio with his siblings and pupils Catharina and Jan Peeters.
