Antonio Vivaldi’s the Four Seasons is the most popular piece of classical music of all time. It’s become so ubiquitous that it has been denounced as Muzak for the middle classes. Rick Wakeman – platinum-selling prog rock keyboardist and television Grumpy Old Man – thinks the critics are wrong. He believes that the Four Seasons was so far ahead of its time that it was actually the first ever concept album – and that Vivaldi was the world’s first rock superstar.