Read the following passage:

The Taj Mahal is a white marble ___(X)___ located in Agra, India. It was built by the Mughal Emperor Shah Jahan in memory of his beloved wife, Mumtaz Mahal, who died during childbirth. The Taj Mahal is considered one of the finest ___(Y)___ of Mughal architecture, a ___(Z)___ of Indian, Persian, and Islamic styles. It is a UNESCO World Heritage Site and is one of the most visited tourist attractions in the world, with millions of visitors each year.