What does the following sentence suggest?

The Taj Mahal, which is located in Agra, India, was built in the seventeenth century by the Mughal emperor Shah Jahan.

The sentence suggests that the Taj Mahal is a famous monument in Agra, India which was built by the Mughal emperor Shah Jahan in the seventeenth century.

Was he the only or the multipel of the emporers

Shah Jahan was one of the Mughal emperors, not the only one. There were several Mughal emperors who ruled during different periods of Indian history. Shah Jahan was known for his patronage of art and architecture, and the Taj Mahal is one of the most famous examples of his architectural achievements.