A major turning point in world history took place in Orissa. The famous Kalinga war that led emperor Asoka to embrace non-violence and the teachings of Buddha was fought here in 261 BC. Later on, Asoka was instrumental in spreading Buddhist philosophy all over Asia.

In the second century BC, Kalinga flourished as a powerful kingdom under Jaina king Kharavela. He ruled all the way down south to include parts of the Tamil country. It is he who was built the superb monastic caves at Udayagiri and Khandagiri. Subsequently, the kingdom was ruled under various monarchs, such as Samudragupta and Sasanka. It also was a part of Harsha’s empire. In 795 AD, the king Yayati united Kalinga, Kosala and Utkala into a single empire. He also built the famous Jagannath temple at Puri. King Narasimha Dev is reputed to have built the magnificent sun temple in Konark. Although now largely in ruins, the temple would easily have rivaled the Taj Mahal in splendor.

The ruins of a major ancient university and center of Buddhist learning, Ratnagiri, was recently discovered in Orissa. Scholars from far away lands, such as Greece, Persia and China used to study philosophy, astronomy, mathematics and science at this famed University. Taxila, Nalanda and Ratnagiri are the oldest universities in the world. The ruins of Ratnagiri University have not been fully excavated yet.

During the medieval period of Indian civilization, Orissa was ruled by a succession of Muslim kings. It was later annexed by emperor Akbar and became part of the Mughal empire. After the fall of the Mughals, the Marathas under Shivaji invaded the land and continued to rule until 1803 AD when Orissa fell prey to the British. Modern Orissa was carved out of Bihar in 1936.

Contemporary Orissa has a proud cultural heritage that arose due to the intermingling of three great religious traditions - Hinduism, Buddhism and Jainism. It has been further enriched by Islam and Christianity. The culture of the Adivasis (the original inhabitants of India) is an integral part of modern Orissan heritage.

The dynasties that ruled Orissa beginning in the third century BC included:
Murundas Dynasty
Matharas Dynasty
Nala Dynasty
The Vigrahas and the Mudgalas
Sailodbhava Dynasty
Bhaumakaras Dynasty
Nandodbhavas Dynasty
Somavamsis Dynasty
The Eastern Gangas
Suryavamsi Dynasty

After long resistance to the Muslims, the region was overcome (1568) by Afghan invaders and passed to the Mughal empire.

After the fall of the Mughals, Orissa was divided between the Nawabs of Bengal and the Marathas. In 1803 it was conquered by the British. The coastal section, which was made (1912) part of Bihar and Orissa Province, became in 1936 the separate province of Orissa. In 1948 and 1949 the area of Orissa was almost doubled and the population was increased by a third with the addition of 24 former princely states. In 1950, Orissa became a constituent state of India. The state is governed by a chief minister and cabinet responsible to an elected unicameral legislature and by a governor appointed by the president of India.