What are some of the reasons for the decline and fall of the Roman Empire?

 The Crusades of the 11th, 12th, and 13th century exposed Western Europe to a larger world. 

What is a hajj?

 What is the language of the Qur’an?

Identify the artwork and its origin.

What is the term for a wall painting done on wet plaster?

Identify the artwork and its location.

What is the meaning of Atman?

What is the meaning of the word “Islam”?

Please describe the principle of Ying and Yang? Be as specific and detailed as possible.