Izaak van Oosten, Isaak van Oosten or Isaac van Oosten (sometimes even: 'Izaak van Costen') (10 December 1613 – December 1661) was a Flemish Baroque landscape and cabinet painter. Little is known about his life and training. He was born in Antwerp as the son of an art dealer with the same name who had become a master in the Antwerp Guild of Saint Luke in 1617. There is no record of where he received his training or with which master(s) he studied. It is believed he painted for his father's shop and therefore did not initially register with the Guild. He only became in 1652 master of the Antwerp Guild of Saint Luke when he was already 39 years old after the Guild had insisted he join and pay his dues. He was active for only about a decade. His landscapes are simple and open. The open spaces of his mainly hilly landscapes are typically filled with a pond or road and several clusters of trees. There is an overall sense of gentleness and calm in these compositions. An even, gentle light spreads over the entire painting and the trees are untouched by the wind. He appears generally not to have been influenced by the woodland painters with their preference for dense forest scenes. A number of his landscapes have a Mediterranean flavour. There is no evidence that van Oosten travelled to Italy and his Italianate landscapes must therefore have been inspired by the work of other painters. He regularly returned to the themes of The Garden of Eden and the Creation of the Animals, which allowed him to show off his skills in painting many animal species – mammals, fish and birds, as well as the imaginary unicorns. He often painted on copper, the smooth surface of which allowed him to arrive at his detailed descriptions of flora and fauna.