At the heart of Hajj stands the Kaaba, draped in 670kg of silk and embroidered with 200kg of gold and silver thread.

At the heart of Hajj stands the Kaaba, draped in 670kg of silk and embroidered with 200kg of gold and silver thread.

As the annual Hajj pilgrimage began on Monday, more than 1.5 million Muslims from around the world gathered in Mecca, Saudi Arabia, for the sacred journey that forms one of the…