GLASGOW.- As Glasgow’s new transport museum prepares to open to the public next month, a unique exhibition examining the way in which a building is much more than the sum of its parts, has been seen by more than 7000 people since it opened last month. Patricia Cain’s Drawing (on) Riverside takes its cue from the new Riverside Museum, which has been taking shape for the last four years on the site of the former Pointhouse shipyard on the River Clyde. Designed by architectural ‘superstar’ Zaha Hadid, the Riverside opens to the public on June 21. It is Hadid’s first major public building in the UK. Hadid is making a rare visit to Glasgow on June 9, during which time she will visit Cain’s exhibition at Kelvingrove. She is also scheduled to do a rare ‘in conversation’ event at Kelvingrove with Deyan Sudjik, director of the Desi