Inspiring recent discovery 3:
Cuban Art Schools, half-completed in the 60s and then left to languish. Now being restored, thanks partly to John Loomis. More fabulous pix here. Exuberantly optimistic forms, complete with vulva fountain.
Necessity being the mother of invention, the place was built using timbrel vaulting, which needs minimal scaffolding and no steel reinforcement.
"The timbrel vault does not rely on gravity but on the adhesion of several layers of overlapping tiles which are woven together with fast-setting mortar. If just one layer of thin tiles was used, the structure would collapse, but adding two or three layers makes the resulting laminated shell almost as strong as reinforced concrete… a timbrel vault is very thin compared to a Roman vault, while at the same time it is capable of bearing much higher loads. This of course enables wider spans and gentler curves”
So here are some nice examples of timbrel vaulting elsewhere, viz: