[xzins]

Which religion was established by that monument? Can you point me to their headquarters and phone number?

[strela]

Which religion was established by that monument?

If you are referring to the Ten Commandments monument in Alabama, that would be Christianity.

Can you point me to their headquarters and phone number?

I am not anywho.com. If you want the location of the headquarters and phone number of your local Christian sect, I'd suggest you call the nearest church and ask them or ask your clergyman.