There are 107 bell towers in Venice. Wherever you go in the city the passage of time is measured by the echo of bells across rooftops. But the biggest bell of them all – the Marangona in St. Mark's Basilica – only stirs into sound twice a day: at midday and midnight. In this beautiful soundscape Radio 3’s Slow Radio takes you from the chime of Marangona at midday, along lapping canals and whispering alleyways, across piazzas and bridges, around this evocative city, until midnight, when the deep, resonant sound of the Marangona brings the day to an end.