To date, kwadrat script always associated with Kadiri era from 12th century, so that it is known as “kwadrat kadiri”. Besides in Central Java and East Java, there are some inscriptions in Bali which use kwadrat script. This research aims to know the development of kwadrat script and since when this script was used. Besides, it is also to track the historical relation of the use of kwadrat in Java, especially East Java with Bali. This research uses analitical-descriptive method and paleography approach. Based on paleography analysis, it is known that kwadrat script had been known since the era of King Dharmawangsa Tguh (± 991-1016). This script was brought to Bali by King Dharmawangsa Tguh’s sister named Gunapriya Dharmapatni/Mahendradatta w...