The most prominent and defining feature in the prehistoric era of Hoa Binh is the Hoa Binh Culture. The Culture was first discovered in Hoa Binh. The significant prehistoric culture represents not only Vietnam but also Southeast Asia and southern China. Through excavations of cave sites in the limestone regions of Hoa Binh, French archaeologist M. Colani introduced the world to a "Stone Age in Hoa Binh province – Northern Vietnam" in 1927. On January 30, 1932, the First Congress of Far Eastern Prehistorians, held in Hanoi, officially recognised the Hoa Binh Culture.