The area to the east of the River Code, in Yogyakarta, is culturally significant. Several old Dutch-style houses are well maintained. It was in this neighborhood that colonial era officials once resided. One of the historic buildings is the Santo Antonius Church, better known as Kotabaru Church.

Just north of the church, lived Ernest Douwes Dekker. "To be precise, on Jalan Telomoyo, said Ibu Imam, wife of the expert on customary law, Imam Sudiyat