Trieu Tuong Mausoleum is located at Gia Mieu hamlet, Ha Long commune, Ha Trung district, Thanh Hoa province. It is the National Mausoleum from the Nguyen dynasty, which was started to be build in the second Gia Long year (1803). The architectural complex is large - scaled, but it was so seriously damaged that its horizon could be recognized through the remained water ditches and soil ramparts surrounding it and the southern road leading to the centre. The excavation in 2010 in this area revealed 4 architectural horizontal plans with traces of pillar bases rammed with broken bricks, tiles and gravels. The artifacts collected from the excavated trenches include building materials such as stones, bricks, tiles, ceramics, stoneware and some iron items. The excavation data and the historical annals demonstrate that the Trieu Tuong Mausoleum site consists of two architectural layers. The early layer from the seventh - eighteenth centuries is small scaled, which might have been the Nguyen Kim's shrine. The late layer contains two main architectural levels: Nguyen Shrine and Trung Shrine, which was started to be built in 1803 on the large scale with a complete planning. Those architectural works existed until 1948 through many times of reconstruction. Trieu Tuong Mausoleum - Shrine has high historical and cultural values as they express the ideals of Eastern architecture of an Imperial City in miniature with the contemporary architectural, sculptural and fine art quintessence.