The Mampalli copper plate (974 AD), also romanised as Mamballi, records a donation from the chiefly family of Venad, present-day Kerala, to the Chengannur Temple.[1] The inscription is the earliest epigraphical record to mention the Kollam Era (as "Kollan-Tonri Era", year 149).[1][2]
The record is engraved on both sides of a single copper plate in Vattezhuthu with necessary Grantha characters in an early form of Malayalam language. The plate was originally owned by Mampalli Madhom, near Trivandrum (now at Padmanabhapuram Palace Museum).[1]
A second plate, companion to the first one and ascribed approximately to the same date, is owned by Mampalli Madhom.[1]