LOUIS BEZACIER studied at the Paris School of Fine Arts from 1929 and took architecture classes at the Defrasse-Madeline workshop from 1931-1932. He arrived in Hanoi on October 3, 1935, taking on the role of preserving works in Tonkin, then in Central Vietnam, a geographical area larger than Tonkin including most of the territory of the old Champa kingdom. As soon as he arrived in Vietnam, he carried out renovation work on one of the most beautiful buildings in Tonkin, Ninh Phuc Pagoda (also known as But Thap Pagoda), in Bac Ninh province. He also carried out excavations to find traces of previous works. By 1945, he devoted most of his time and enthusiasm to ancient civil and religious architecture such as pagodas, mausoleums, Le Dynasty palace ruins, covered bridges... in the Red River Delta and Thanh Hoa province. He also repaired a brick pavilion in Binh Son, Vinh Yen province, dating from the 11th century. He was the one who identified a new style: Dai La art (11th-12th centuries). In addition, he was also responsible for renovating many Champa works in the Ly Son relic area.