Through the comparative study of 20 extant remaining buildings and thier description in historical sources, this article proposes the following categories for the connecting method between plural buildings seen in Hue Nguyen Dynasty architectural remains; (1) The "Triêu Tô Miêu type" defines the method by which the space of "Thùa Luu" between the front building and the back building is enclosed by the "Thuòng giai", therefore creating a "Trùng Diêm style" roof. This type includes 11 standard examples and 4 particular examples. (2) The "Du Khiêm Ta type" does not include the space of "Thùa Luu", connecting directly each building's column by a "Tren". This type includes 2 remaining examples.
