Siewertz, Jan Niederlande, 17. Jhdt. 66 x 116 cm Portrait of a wealthy bourgeois family in front of a river landscape. Oil/panel, dated Ao 1624 lower right, on the flag of the boat signed IAN SIEWERTZ. Probably a work by Jan Sieuwertsz. Kolm (Amsterdam 1589-1637). Bavarian private collection.

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