Meitei literature, also known as Manipuri literature, is literature written in the Meitei language of Manipur. An ancient institution of learning, the Luwang Nonghumsang, later known as the Pandit Loishang, collected sources of indigenous Meitei knowledge and philosophy until the 18th century. Writing by Meiteis is assumed to go back to the Kingdom of Kangleipak in the early 12th century. The Meitei script is a Brahmic abugida. It is known only from the Puya manuscripts discovered in the first half of the 20th century. 18th and 19th century manuscripts were written using the Bengali alphabet. The existence of the Meitei script in the 15th-century hinges on the authenticity of an inscription dated to the reign of Senbi Kiyamba.