(b. 1575, Antwerpen, d. 1632, Antwerpen)
Flemish figure and portrait painter, active mainly in Antwerp. He was in Rome in 1598 and back in Antwerp by 1601. A second visit to Italy seems likely, for although in 1601 he was painting in a Mannerist style (Diana and Callisto, Museum of Fine Arts, Budapest), by 1909 (Scaldis and Antwerpia, Musée Royal, Antwerp) his work had become much more solid, sober, and classical, suggesting close knowledge of Caravaggio in particular. For the next decade Janssens was one of the most powerful and individual painters in Flanders, but during the 1620s his work became less remarkable as he fell under the all-pervasive influence of Rubens. His pupils included Gerard Seghers and Theodoor Rombouts.