The children of the artist, Magdalena (born 1618) and Jan-Baptist (born 1619) de Vos, seated full lengths in a landscape

The prototype of circa 1621/2, oil on canvas, 78 x 92 cm, has been in the Gemäldegalerie der Staatlichen Museen, Berlin, since 1837 (K. van der Stighelen, "De portretten van Cornelis de Vos (1584/5-1651): een kritische catalogus" in Verhandelingen van de Koninklijke Academie voor Wetenschappen, Letteren en Schone Kunsten van België, 1990, no.51, pp.38/41, cat.no.11, ill.).