The curtain wall
A tower after the Seagram Building (Mies van der Rohe, 1958): a skin of glass and bronze hung from the edges of the floor slabs, independent of the frame behind it.
The rules it illustrates
All the arts serve the building. Train artists as craftsmen in workshops, and unite architecture, sculpture, painting and design in the common work of building.
The curtain wall. Hang the outer wall from the edges of the floor slabs as a continuous skin of glass and metal, independent of the frame behind it, and express its grid of mullions.
Where it appears in the book
In the styles Modernism.
In the chapters Frame and Skin.