Ganesha (also spelled Ganesa or Ganesh) is one of the best-known and most worshipped deities in Hinduism. Although he is known by many other attributes, Ganesha's elephant head makes him easy to identify. Several texts relate mythological anecdotes associated with his birth and exploits, and explain his distinct iconography. Ganesha is worshipped as the lord of beginnings and as the lord of obstacles (Vighnesha), patron of arts and sciences, and the god of intellect and wisdom. He is honoured with affection at the start of any ritual or ceremony and invoked as the "Patron of Letters" at the beginning of any writing. Ganesha appears as a distinct deity in clearly-recognizable form beginning in the fourth to fifth centuries, during the Gupta Period. His popularity rose quickly, and he was formally included as one of the five primary deities of Smartism (a Hindu denomination) in the ninth century. During this period, a sect of devotees (called Ganapatya) who identify Ganesha as the supreme deity was formed. The principal scriptures dedicated to his worship are the Ganesha Purana, the Mudgala Purana, and the Ganapati Atharvashirsa. Ganesha is one of the most-worshipped divinities in India. Worship of Ganesha is considered complementary with the worship of other forms of the divine, and various Hindu sects worship him regardless of other affiliations. Devotion to Ganesha is widely diffused and extends to Jains, Buddhists, and beyond India.