Agra Gharana is a tradition of Hindustani classical vocal music descended from the Nauhar Bani. So far, Nauhar Bani has been traced back to around 1300 AD, during the reign of Emperor Allauddin Khilji of Delhi.
The first known musician of this tradition is Nayak Gopal. The style prevalent then in the Gharana was “Dhrupad-Dhamar”. Ustad Ghagghe Khudabuksh (1790-1880 AD) introduced the “Khayal” style of Gwalior Gharana into Agra gharana which Khudabaksh learnt from Natthan Paribaksh of Gwalior. Furthermore the Khayal style of Atrauli Gharana was added in the late 19th century.
Read more about Agra Gharana: Distinguishing Characteristics, Some Prominent Exponents