This was beautiful to listen to. By pure luck (should have done more reading), I was visiting Pisa in Italy. There's a building (the baptistry) _beside_ the leaning tower, which has the most perfect acoustics.
Every hour, they close the doors and a person sings a series of individual notes which then interact just _beautifully_ in the building. Hard to describe. There's a soundcloud[1] here, not mine, stars properly around 1:23. I think you really have to be there though, it was wonderful.
If you're interested, researchers from the University of Bologna have been working on virtual acoustic models of that space in its current form [0] as well as past configurations [1] that you might be able to look into. It is truly huge reverberation! And thus, pretty difficult to simulate.
Every hour, they close the doors and a person sings a series of individual notes which then interact just _beautifully_ in the building. Hard to describe. There's a soundcloud[1] here, not mine, stars properly around 1:23. I think you really have to be there though, it was wonderful.
[1] https://soundcloud.com/miguelisazam/pisa-baptistry-of-st-joh... [2] https://en.wikipedia.org/wiki/Pisa_Baptistery