Go at opening on a weekday — the Capilla Mayor is quieter than it looks from outside
Tour groups arrive between 10:30 and 11:30 AM. At 10:00 on a Tuesday or Wednesday, you can stand in the centre of the Capilla Mayor with almost no one around you. The circular space has a very specific acoustic quality — voices carry in ways that feel odd — and the stained glass reads differently in morning light than midday. Getting there at opening costs nothing and gives you the space as it was designed to be experienced: empty, vertical, and lit from above.