The 10 Commandments, also known as the Decalogue.
Christianity does not have any rules about what you can or can not eat.
Christans
God's Word, the Bible
Christianity has no rules about this and abides by the local laws of whichever country they are marrying in.
Christianity has many denominations and sects, each with their own set of rules. Christianity is not a religion, it's many, many religions. The most common denominator among Christians is the Christian Bible, the new testament, and the ten commandments. Each denomination or sect has their own interpretation of these and has devised their rules according to their interpretation.
Christianity, Islam, Buddhism, Hinduism
Christians
They get frowned upon or excommunicated.
The Bible very simply.
differ proper names from things named after proper names
a guy names ....
laws