This building was originally called Laksami Philat after Phra Nang Ther Laksami Lawan, one of the King's consorts. It is a two-storey building in brick and mortar, situated to the west of Phiman Chakri Hall. It has a small English Gothic-style turret. There is an open corridor connecting the second floor of this building to that of Phiman Chakri Hall. Sisuthaniwat was used as the queen's audience hall. Floral designs decorate ceiling and upper walls of the rooms in this building. In the main room there is a western-style painting of a shepherd and shepherdess.