Kingdom of Surasena (or Sourasena) (Sanskrit: ) was an ancient Indian region corresponding to the present-day Braj region in Uttar Pradesh, with Mathura as its capital city. Surasena kingdom was Shoorsaini Dynasty. According to the Buddhist text Anguttara Nikaya, Surasena was one of the solasa (sixteen) Mahajanapadas (big settlements) in the 6th century BCE. Also, it is mentioned in the Hindu epic poem, the Ramayana. The ancient Greek writers (e.g., Megasthenes) refer to the Surasena and its cities, Methora and Cleisobra. Sourasenoi is one of the Indian tribes and it's a Greek word by megasthenes named as Shoorsaini in modern Era. The Etymology of the name is uncertain. The Śūrasena state was located on the Yamunā river, and its capital was the city of Mathurā. The Puranas refer to the rulers of the Mathura region as the king Shoorsen divided into a number of sects, which include the Vrishnis Yaduvanshi . The Buddhist texts refer to Avantiputta, the king of the Surasenas in the time of Maha Kachchana, one of the chief disciples of Gautama Buddha, who spread Buddhism in the Mathura region. Its capital, Mathura, was situated on the bank of the river Yamuna, presently a sacred place for the Hindus. The ancient Greek writers mention another city, named Cleisobora, in this region. Archaeological excavations at Mathura show the gradual growth of a village into an important city. The earliest period belonged to the Painted Grey Ware culture (1100-500 BCE), followed by the Northern Black Polished Ware culture (700-200 BCE). Mathura derived its importance as a center of trade due to its location where the northern trade route of the Gangetic Plain met with the routes to Malwa (central India) and the west coast. North India in 540 BCE.png|Map depicting 16 [[mahajanapada]]s kingdoms and other kingdoms of [[vedic era]] India in 540 BCE.{{cn|reason=the map boundaries are original research of a YouTuber|date=November 2021}} Saurasena coin.jpg|Shoorsen coin, 400-300 BCE.