This seminar explores the discontinuous history of axonometric projection in art, architecture, mathematics, and science from the Renaissance to the present day. We consider different uses of axonometry in descriptive geometry, mechanical drawing, and crystallography, and we take up various practitioners such as Auguste Choisy, El Lissizky, Theo Van Doesburg, Le Corbusier, Peter and Alison Smithson, the Minimalists, and the New York Five Architects.