[1rudeboy]

I stand corrected. I’ve been in that cathedral a number of times, and there’s no way I can be convinced that it’ll fit 40,000—but that’s just my opinion.

[Kirkwood]

I’ve been there and I can see where it would seat 4000. The experience of going there was marred by being constantly followed by pickpockets in the piazza and sidestreets.

[Right Wing Assault]

there’s no way I can be convinced that it’ll fit 40,000

Its main area is 14,000 square yards. You can fit three people standing in a square yard.