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The superb new Sculpture Centre at Goodwood, West Sussex, designed by Studio Downey is the subject of the latest in a series of exhibitions that go under the telly-style heading, "How did they do that?" at the RIBA Architecture Centre, 66 Portland Place, London W1. Craig Downey's light and airy woodland building is a fine example of how the very best Modern architecture can be cheap and beautiful, as long as clients have the confidence to allow architects off the rein. Further information, 0171-580 5533

Redundant Fifties and Sixties offices are increasingly being turned into city flats rather than being threatened with demolition; the latest is the10-storey Downstream block, which forms a part of the mighty Shell Centre (1953-63) designed by Sir Howard Robertson and overlooking Waterloo International train station.