Tugu Inscription was found in Tugu-Village, Koja Sub-district, North-Jakarta. It is carved on andesite-stone with writings of Pallava script and Sanskrit language. The form of Pallava letters used indicates that it dates from the middle of 5th Century. It is the longest inscription issued by Pūrṇṇawarman, and it describes the event of Candrabaga River excavation by Rajadirajaguru, and Gomati River by Pūrṇṇawarman in the 22nd year of his reign. It has a national value for being an early-milestone in the history of Sanskrit-language and Pallava-script usage (originated from India) in Java, which also shows the archipelago royal institutions system advancement.