Sorry, sorry, sorry!!
The Velankanni Church church dedicated to Our Lady of Health, the Madonna of Velankanni is the one in which 2,000 pilgrims were saved. The water apparently went up to the first few steps and then receded. the buildings around and behind it were destroyed.
So does this make 2 Catholic churches spared?
A lotta mosques were saved for the same reason - you notice in Banda Aceh, only the big mosque made it. I think it's due to sturdy construction rather than the hand of God.