From the BBC:

"You may like my buildings or you may not," Oscar Niemeyer often said, "but you'll never be able to say you've seen anything similar before." And for many people who visit Brasilia, the capital city regarded as the Brazilian architect's masterpiece, that is undoubtedly true. Oscar Niemeyer, who has died aged 104, was one of the most innovative and daring architects of the last 60 years. Rejecting the cube shapes favoured by his modernist predecessors, Niemeyer built some of the world's most striking buildings - monumental, curving concrete and glass structures which almost defy description. Conceived with a few curving lines on a sheet of paper, his designs are regarded by many as more sculpture than architecture.

“Curves make up the entire universe, the curved universe of Einstein.” Oscar Niemeyer