[3] Because of the role of the building in the formulation of the independence proclamation text, in 1984, Minister of Education and Culture Nugroho Notosusanto directed that it be converted into a museum.

[3] The first room became the site of the first historical event in preparation for the formulation of the Indonesian proclamation of manuscripts.

In addition, this room also describes the atmosphere before the proclamation, such as the process of forming the BPUPK and the PPKI and the atomic bombings of Hiroshima and Nagasaki.

The second room became the place where Sukarno and Hatta held a meeting together at a round table with other administrators such as B.M.

The third room has a piano, which is the place where Sukarno and Hatta signed the text of the proclamation of Indonesian independence.