Islamic law (sharia) permits marriage between Muslim men and women who are People of the Book (Jews and Christians); in the case of a Muslim-Christian marriage, which is to be contracted only after permission from the Christian party, the Christian spouse is not to be prevented from attending church for prayer and Islamic law (sharia) permits marriage between Muslim men and women who are People of the Book

Who are you not allowed to marry in Islam?

Prohibited to you are your mothers, your daughters, your sisters, your paternal aunts, your maternal aunts, brothers daughters, sisters daughters, your mothers that are those who suckled you, your sisters from suckling, mothers of your women, your step-daughters in your guardianship from your women you have entered

Is it legal for a Muslim to have more than one wife?

Muslim men can have up to four wives. Most Muslim marriages are not polygamous. But each year more than 1,000 men apply for a polygamous union. They do this via the Islamic law courts.