Showroom No. 4: Exhibits and introduces cultures of 21 ethnic groups of Môn - Khmer language family (Ba Na, Brâu, Bru - Vân Kiều, Chơ Ro, Co, Cơ Ho, Cơ Tu, Gié Triêng, H’rê, Kháng, Khmer, Khơ Mú, Mảng, Xinh Mun, Mnông, Ơ Đu, Mạ, Rơ Măm, Tà Ôi, Xơ Đăng, Xtiêng). The people live scatteringly in the North - East, Central – Central Highlands and South VietNam. They live mainly on cultivating burnt-over land by making holes for the seeds with a digging stick. Architectures of communal house and long house on the Central Highlands and pagoda of Khmer people; weaving handicraft and community cultural festival are unique cultural features of the Môn - Khmer people.