http://www.kunsthaus.ch/en/the-collection/conservation/examples-from-the-world-of-art-conservation/egon-schiele/fig3/?redirect_url=title%3DRai

Kunsthaus Zürich

Egon Schiele

Detail: beige-coloured wax compound on the canvas (marked by red arrows). Area from the top of the chimney on the large white house.
Detail: beige-coloured wax compound on the canvas (marked by red arrows). Area from the top of the chimney on the large white house.