The Phuan population were able to retain a high degree of autonomy although they had to pay tax and tribute to Lan Xang. During the 16th century expressive Buddhist art and architecture flourished. The capital was dotted with temples in a distinct Xiangkhouang style, i.e., simple low roofs with a characteristic "waist" at the foundation. In 1930 Le Boulanger described it as "a large and beautiful city protected by wide moats and forts occupying the surrounding hills and the opulence of the sixty-two pagodas and their stupas, of which the flanks concealed treasures, obtained the capital a fame that spread fear wide and far."