An Indian Christian sigil?

This Christian sigil, found in India, has been puzzling an online friend of mine.  Being able to read Tamil could help, especially considering my friend's accidental discovery that the sigil has a back side with what appear to be detailed explanations of its different geometrical regions.  Any ideas, fellow bloggers?  Here are some discussion points:

1. I'm reassured that the eight-sided wheels are not the usual Buddhist "Wheels of the Law."
2. Jesus is in the middle of the figure -- solar, and likely not constrained by the surrounding figure -- surrounded by protective saints.