Flowerlike concrete appendages rose to the sun, bejeweled with glass, marbles and shards of old pots. Broken tiles were cemented into intricate mosaics called trencadís — the stuff Antoni Gaudí once made famous in Barcelona. But unlike Gaudí, the creator of this construction had no training in architecture, art or engineering. The art world has long kept a place at the table for so-called “outsider art.” Works by painters with no formal training get special auctions at Christie’s. New York has had an art fair devoted to outsider artists since the 1990s, which welcomes art by children, prisoners and a wide variety of others.

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Persons: Jo Farb Hernández, Antoni Gaudí, ”, Hernández Locations: Spain’s, France, Barcelona, . New York