Samudragupta, the fourth ruler of the Gupta Empire, held the title of Kaviraj. He was an influential and powerful ruler who reigned from 335 CE to 380 CE.

Background on the Gupta Empire:
- The Gupta Empire was one of the most significant and prosperous dynasties in ancient India, known for its cultural and scientific achievements.
- The empire was founded by Sri Gupta, but it was under the rule of Samudragupta and his successors that it reached its pinnacle of power and glory.

The title Kaviraj:
- The title Kaviraj translates to "king of poets" or "poet king."
- It signifies the ruler's patronage and appreciation for literature, poetry, and the arts.
- Samudragupta was not only a skilled warrior and statesman but also a great patron of learning and the arts. His court was known for its intellectual and cultural vibrancy.

Samudragupta's reign:
- Samudragupta was an ambitious and expansionist ruler who undertook several military campaigns to expand the Gupta Empire.
- He is often referred to as the "Napoleon of India" due to his military prowess and successful conquests.
- During his reign, Samudragupta achieved military victories over various kingdoms and regions, including the Naga tribes, the Vakataka dynasty, and the kingdoms of South India.
- He brought most of North India under his control and established a vast empire.

Legacy and contributions:
- Samudragupta's reign marked a golden age in Indian history, characterized by political stability, economic prosperity, and cultural development.
- He promoted art, literature, and music, and his court was a center of intellectual activity.
- Many scholars and poets flourished during his time, and his patronage of the arts contributed to the growth of Indian literature and poetry.

In conclusion:
Samudragupta, the ruler of the Gupta Empire, held the title Kaviraj, which denoted his appreciation for literature and the arts. He was a powerful and influential ruler who expanded the empire through military conquests. His reign marked a golden age in Indian history, known for its cultural and intellectual vibrancy.