Hello shaka, fortunate that you could live that experience because according to its inhabitants one of the curiosities is: The spectacle of the Eight. I could investigate that it has many curiosities, the main attraction that I read is that:
At certain times of the year, inside the "Seu" you can enjoy a spectacular light phenomenon. Specifically, it takes place twice a year (on 2 February and 11 November), coinciding with the festival of Candelaria and San Martín, respectively. On those days, sunlight passes through the main rose window and its reflection is projected onto the wall in front, so that, for a short period of time, one is reflected on top of the other, forming a double rose window: one made of glass and the other of light.In addition to having many stories enclosed in that cathedral, I think it is one of the largest and is the heritage of humanity through Unesco, its Gothic structure makes us ride on the machine of time and dream of seeing this spectacular beauty, so thank you very much for sharing this publication so sublime @shaka.