During the 11th century while a united-feudal state was developing, the Ly Dynasty initiated a new phase in architectural development.

Generally, the architecture of Ly Dynasty, 11th and 12th centuries, had five orthodox styles: citadels, palaces, castles, pagodas, and houses.

Thang Long Citadel had a complex of palaces, many of which were 3-4 floor temples. At that time, the Thang Long culture deeply reflected the cultural characteristic of the tower-pagoda. The architectural characteristics of the Ly Dynasty were residential complexes, more ornamental roofs, doors, door-steps, banisters, and rounded statues, all in a suitable design for the climate and traditional customs of Vietnam. Streets, markets, ground and stilt houses in popular architectural design developed simultaneously as royal palaces.