The essence of his architecture can be summed up at the Kimbell: 16 parallel vaults supported on a beautifully articulated concreteframe allow perfect natural light into the humanely scaled galleries.
The design featured a wooden frame on top of a concrete-slab foundation, with an exterior covered in gray asbestos shingles. (Steel was in short supply.) The structure violated the Cambridge fire code, but it was granted an exemption because of its temporary status.