Shah (Persian: شاه) is a Persian word which means the king or ruler of a country. This word is used in different countries in the world, including Iran, India, Pakistan and Afghanistan. Presently the term "Shah" is used as a surname by people in India, Pakistan and Afghanistan who are Hindu, Muslim and Jain. The most famous of them is Shah Jahan, who as the Emperor of India ordered the creation of Taj Mahal.