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 Loyamba Sinyen (), is an 11th-12th century written constitution, regulated in the Manipur kingdom during the regime of King Loiyumba (1074-1122 CE). A promulgation of the proto-constitution in 429 CE by King Naophangba was reduced to a final format in 1110 CE. Historically, it is the first written constitution, and one of the well recorded antique manuscripts of the kingdom. Its Constitutionalism was replaced by the Manipur State Constitution Act, 1947, that was functional until Manipur was merged into India on October 15, 1949.