axonometric projection

In mechanical drawing, axonometric projection is used to represent three-dimensional objects, such as buildings. To create an axonometric view, the object is tipped relative to the plane of projection, so that its principal faces, such as the top, side, and front, show in a single view. This produces a pictorial drawing that is easy to visualize, but because the principal faces of the object are inclined relative to the plane of projection, the lines are foreshortened.  Web resource here. Video here.

Margarethe Fröhlich. Design for a Modern Living Room with Piano. Graphite, gouache, watercolor, collaged paper and metal foil, on cardboard. 1933–39. Cooper Hewitt, Smithsonian Design Museum, New York.