In commemoration of the 20th Anniversary of the International Council of Museums, the National council of museums of Thailand arranged an exhibition of masterpieces from private collections at the Bangkok National Museum from the 6th March-6th April 1968. Many famous art collectors in Bangkok participated in this exhibition from H.M. the King downwards and it was attended by 77,235 visitors. This volume will discuss Chiengsaen style, U-thong school, Ayutthaya and Rattanakosin periods.