The Haridasa (Kannada: ಹರಿದಾಸ) devotional movement that originated in Karnataka, India after Madhvacharya, and spread to eastern states such as Bengal and Assam of medieval India. Over a span of nearly six centuries, several saints and mystics helped shape the culture, philosophy and art of South India in general and Karnataka in particular by exerting considerable spiritual influence over the masses and kingdoms that ruled South India.
This movement was ushered in by the Haridasas (lit "servants of Lord Hari") and took shape in the 13th century - 14th century CE period, prior to and during the early rule of the Vijayanagara empire. The main objective of this movement was to propagate the Dvaita philosophy of Madhvacharya (Madhva Siddhanta) to the masses through a literary medium known as Dasa Sahitya (lit "literature of the servants of the Lord").
Prominent Hindu philosophers, poets and scholars such as Sripadaraya, Vyasathirtha, Vadirajatirtha, Purandara Dasa and Kanaka Dasa played an important role during this time. Though the movement found its roots in the Kannada country and later spread to other parts of South India, it was a net result of earlier devotional movements such as the Veerashaiva movement (of Vachana literature in Kannada) of northern Karnataka led by Basavanna (12th century) and the Alvar saints of Tamil Nadu (10th century). Later, Vallabhacharya in Gujarat and Guru Chaitanya were influenced by the teachings of Madhvacharya. Their devotees started the worldwide ISKCON movement.