A miniature sundial survives the destruction of Pompeii. The most elaborate clock the world has ever seen is constructed in 11th-century China. In medieval Normandy, mechanical clocks rouse monks in the middle of the night. And an opportunistic Londoner starts a business that literally sells time… A Noiser production, written by Roger Morris. For ad-free listening, exclusive content and early access to new episodes, join Noiser+. Click the Noiser+ banner to get started with a 7-day free trial. Or, if you’re on Spotify or Android, go to noiser.com/subscriptions Learn more about your ad choices. Visit podcastchoices.com/adchoices