There are several sources that are used as the basis for the origin of Salatiga, including folklore, legends, inscriptions, and other research. From these sources, the Plumungan inscription is a source of literacy for Salatiga City's Anniversary. The inscription written on a large andesite type stone measuring 170 cm long, 160 cm wide with a circumference of 5 meters was found in Plumpungan hamlet, Kauman Kidul village, hereinafter referred to as the Plumpungan Inscription.
The Plumungan inscription contains a stipulation regarding the status of the fief land or autonomous for an area which was then called Hampra, located in the Trigramyama region. Hampra and the surrounding area at that time were freed from any tax or tribute obligations by Raja Bhanu. The granting of the fief status was a special thing at that time by the king. Not every region was given the status of a fief or autonomous region.
The basis for determining the fief area was given to a village or area that really contributed to the kingdom or was considered special by the King. Written by a Citraleka, who is now known as a writer or poet, together with priests or sages in Old Javanese with the opening sentence "Srȋr astu swasti prajãbhyah" which means "May Be Happy, Happy People".
