British Museum hosts first major exhibition on Hajj . The exhibition, titled "The Great Pilgrimage: A Journey of Faith and Courage," will feature more than 100 objects from the museum's collection that were used in the Hajj, including a replica of the Kaaba at Qu'ran says all Muslims should go at least once in their lifetime .
British Museum hosts first major exhibition on Hajj . Three million Muslims a year take Hajj to Mecca . Qu'ran says all Muslims should go at least once in their lifetime .