Gaudiya Vaishnavism (also known as Chaitanya Vaishnavism and Hare Krishna) is a Vaishnava religious movement founded by Chaitanya Mahaprabhu (1486–1534) in India in the 16th century. "Gaudiya" refers to the Gauḍa region (present day Bengal/Bangladesh) with Vaishnavism meaning "the worship of the monotheistic Deity or Supreme Personality of Godhead, often addressed as Krishna, Narayana or Vishnu". Its philosophical basis is primarily that of the Bhagavad Gita and Bhagavata Purana, as well as other Puranic scriptures and Upanishads such as the Isha Upanishad, Gopala Tapani Upanishad, and Kali Santarana Upanishad.
The focus of Gaudiya Vaishnavism is the devotional worship (bhakti) of Krishna, as Svayam Bhagavan or the Original Supreme Personality of Godhead . Most popularly, this worship takes the form of singing God's holy names, such as "Krishna" and "Rama", most commonly in the form of the Hare Krishna (mantra), also known as kirtan. The movement is sometimes referred to as the Brahma-Madhva-Gaudiya sampradaya, referring to its traditional origins in the succession of spiritual masters (gurus) believed to originate from Brahma. It classifies itself as a monotheistic tradition, seeing the many forms of Vishnu as expansions or incarnations of the one Supreme God, adipurushaknown as Krishna (literally “the All-Atractive”) or Govinda.
Among the Gaudiya Vaishnavas, devotion to Krishna often includes the worship of Krishna along with His spiritual internal potency (hlandhini shakti) or pleasure potency and manifest as His eternal consort, the Goddess of devotion known as Sri Radha.
Read more about Gaudiya Vaishnavism: Philosophical Concepts, History Since Chaitanya Mahaprabhu, Gaudiya and Other Vaishnava Schools, Gaudiya Vaishnava Organizations