The correct answer is: A. Sirsa Fort
Harshavardhana was an Indian emperor who ruled the northern Indian subcontinent from 606 to 647 CE. He was the founder of the Harsha Empire, which at its peak included much of the Indian subcontinent north of the Vindhya Mountains.
Harshavardhana was a powerful and successful ruler. He was also a patron of the arts and literature. He is best known for his Sanskrit play Ratnavali, which is considered one of the finest works of Indian literature.
Sirsa Fort is an ancient fort located in the city of Sirsa in the Indian state of Haryana. The fort was built by Harshavardhana in the 7th century CE. It is one of the most important historical monuments in Haryana.
The fort is built on a high hill and is surrounded by a moat. It has four gates, each of which is guarded by a large tower. The fort is made of stone and brick and is in a good state of preservation.
The fort is open to the public and is a popular tourist destination. It is a great place to learn about the history of India and the reign of Harshavardhana.
The other options are incorrect because they were not built by Harshavardhana.
- B. Mahem Fort was built by the Mughal emperor Akbar in the 16th century CE.
- C. Hansi Fort was built by the Tomar Rajputs in the 12th century CE.
- D. Rohtak Fort was built by the Mughal emperor Jahangir in the 17th century CE.