The earliest historical records concerning the Twipra kingdom concern the 15th century, when it first came under pressure from the Islamic conquests in India. This is also the time of origin of the Manikya Dynasty, started when Chhengthung Fa adopted the title "Manikya", becoming Maha Manikya, with the cognomen being held by all Kings of Tripura until the death of Bir Bikram Kishore Manikya in 1947. Under Ratna Manikya I, the capital shifted to Rangamati on the banks of the river Gumti, now in South Tripura.