I was told I can't have my solemnisation anywhere else other than a Catholic church. But I happened to see the wedding video of Lo Hwei Yen (the lady who got killed by terrorists in India). It showed a Catholic priest solemnising their wedding but it's held by the beach at Bali.
Like that, can meh?
I believe it might be possible if you get special permission from a priest or the bishop, but I can't be sure ...
my cousin in Raffles Town Club