The Taj Mahal is a white marble mausoleum located in Agra, India. It was built by Mughal Emperor Shah Jahan in memory of his third wife, Mumtaz Mahal. The Taj Mahal is considered one of the most iconic monuments in the world and is a symbol of India's rich cultural heritage. The country in which the Taj Mahal is located is India, which has a population of over 1.3 billion people and is the second most populous country in the world.