Loiyumpa Silyel

The Loiyumpa Silyel (Modern Meitei: "Loiyumba Sinyen"), also termed as the Loyumpa Silyel (Modern Meitei: "Loyumba Sinyen") or the Loiyumpa Shilyel (Modern Meitei: "Loiyumba Shinyen") or the Loyumpa Shilyel (Modern Meitei: "Loyumba Shinyen") or the Loyumba Sinyen, is an 11th-12th century ancient Meitei language written constitution, regulated in the Ancient Kangleipak (early Manipur) during the rule of King Loiyumba (1074-1122 CE). In 1110 CE, its format was finalised from a promulgation of the proto-constitution, drafted in 429 CE by King Naophangba. Historically, it is the first written constitution, and one of the well recorded Ancient Meitei language texts of the kingdom. It was replaced by the Manipur State Constitution Act 1947, that was functional until Manipur was merged into Republic of India on October 15, 1949.

It includes the accounts of the distribution of the duties to the subjects of the king. Its rules and regulations remains to be an authoritative work in the Meitei social system till the present day Manipur.