The archive room is part of the permanent exhibition dedicated to the life and legacy of the late Vann Molyvann. It serves as a resource for both national and international researchers, architects, urbanists, designers, artists, curators, and students, offering a space for research and learning.

The archive contains materials from Vann Molyvann’s private collection, including his personal documents and the documents from individuals he encountered throughout his life. All archival materials are used with the permission of the Vann Molyvann’s family and are copyrighted under their care. The documents provide an invaluable insight into Vann Molyvann's work and his profound impact on architecture and urban planning.