 Since 1619 Dutch East India Company has firmly established their base in Batavia, and since the 18th century the inland mountainous region of Priangan has been under their possession, ceded from Banten and Mataram.After Dutch intervention in 1807, Dutch East Indies government has exercised further into the internal affairs of Cirebon states.All of the four keratons finally held no real political power, held as protectorate under Dutch East Indies colonial government.