The Amsterdam painter Piet van Wijngaerdt is regarded, together with Henri Le Fauconnier, as the theorist founder of the Bergen School. He painted landscapes, figures and powerful still lifes in a Cubist-Expressionist style, in which unexpected colour contrasts and the effects of light and shade were important means of expression. For his flowers he chose distinctive forms like amaryllis, lily and gladiolus. For his landscapes he drew inspiration from the farmlands to the south of Amsterdam. After 1941 he worked mainly in and around Abcoude.