Every summer night, Rouen's Gothic cathedral becomes a giant canvas for a free sound-and-light show — and it's one of the loveliest free things to do on an Armada evening.
For more than a decade, the Rouen metropolis has projected a monumental sound-and-light show onto the façade of Notre-Dame Cathedral — the very building Claude Monet painted at every hour of the day. The carved stone dissolves into colour, water and light, often on themes of Impressionism, the Vikings or William the Conqueror.
The show takes place every summer, roughly from late May to late September, after nightfall — nightly in high summer, and on Friday and Saturday evenings around the edges of the season. In 2026 it ran from 29 May to 26 September.
Head to the Place de la Cathédrale as darkness falls (later in June, so around 11pm). There's no seating to book — people simply gather on the square. It lasts about 25–30 minutes and repeats, so you don't need to arrive at a precise time.
Combine it with dinner in the old town — see where to eat in Rouen — and a stroll past the Gros-Horloge. For everything else to see in the city, browse things to do in Rouen.