PG Colomadu was established in 1861 during the era of Sultan Mangkunegara IV. In 1998, PTPN-IX as the manager closed the mill and left the non-functioning building. The plant, which is more than 100 years old, is considered to have a vital function when it was still operating. Accounting for its history, it is not surprising that PG Colomadu becomes one of the most important cultural heritage buildings in Karanganyar, Central Java.