Lyon in 3 days: the Roman capital of Gaul since 43 BCE, where the Jacquard loom (1804) with its punched-card programme directly inspired the computer, where the world's first urban bike-sharing system launched in 2005, where a woman earned 6 simultaneous Michelin stars in 1933, and where 4 million people come to see 4 nights of light projections every December.