Sukarno was born in the city of Surabaya in eastern Java. At the time, Java and the rest of Indonesia were under Dutch colonial control. Although brought up in the traditional Javanese cultural world, Sukarno was educated in modern Dutch colonial schools. In 1921 he entered the Bandung Institute of Technology to study architecture, graduating in 1926. Sukarno had been increasingly involved in nationalist politics since his teens, when he had boarded in the house of H. O. S. Tjokroaminoto, a leading nationalist politician. It was in Bandung that he decided his future lay in politics, not architecture.