Flemish Baroque Era Painter, ca.1580-1624 Flemish painter. In 1596 he went to study with Andries van Baseroo and in 1602 became a master in the Antwerp Guild of St Luke; these two dates suggest his probable date of birth. Beert married Marguerite Ykens on 8 January 1606. Contemporary documents describe him as a cork merchant. The esteem enjoyed by Beert is indicated by the large number of pupils he had, including, in 1610, Frans van der Borch; in 1615, Frans Ykens; in 1616, Paulus Pontius; and, in 1618, Jan Willemssen. Beert's son, Osias Beert the younger (1622-78), was also a painter and became a master in 1645.