The paper introduces Vietnamese ceramics from the Ly dynasty period through the archaeological resources found at Thang Long Imperial Citadel site. At this site, a large number of high-quality and diversified ceramics from the Ly dynasty period have been found, including vases, bowls, turins, basins, lided boxes, high-footed plates with white, celadon, green, yellow glaze, brown-inlaid designs. Of which, there are high-quality ceramics that were sophisticatedly made, with symbolic decorative designs such as dragons, phoenixes reflecting high social class of utensils made for a King and his family only. The findings of white-glazed ceramics from the Ly dynasty period at Thang Long Imperial Citadel site show the probability of kilns or worshop for making ceramics for the royal court right at the peripheral area of the Imperial City and the fact that in the Ly dynasty period, Viet Nam was able to manifacture high-quality white-glazed ceramics that were not inferior to Qinbai or Jingdezhen ceramics (China).