V.N.Bhatkhande (1860-1937 AD) pioneered the introduction of an organised musical system reflecting current performance practices. He wrote the first modern treatise on Hindustani Classical Music. He is best noted for reclassification of the Indian Rāgas. So far, the Rāgas were classified into Rāga (male), Ragini (female), and Putra (children). Bhatkhande reclassified them into the currently used Thaat system. He collected data on music, and documented and analysed performing traditions. His literature on music remains unparalleled even today and is essential for a systematic study of Hindustani Art Music. He classified a total number of 1800 compositions from the major gharanas accessible to him, dividing them in ten thaats according to his that system.