The aim of this paper is to present and interpret the finding situation around so-called north-western gate in the outer bailey of the Great Moravian centre Mikulčice-Valy. In addition to the gate, this area revealed remains of a fortification wall and of a settlement, which was protected by the fortification wall. The analysed and interpreted finding situation was surveyed in 1966-1968. The first sections of the paper define the objectives of the paper (chronology, structure, decay of the fortification), introduces the method of revision processing (analysis of entities and qualities, spatial analyses in the GIS environment) and describes the finding situation revealed in the monitored area. Then, the paper focuses on the analysis of spatial relationships of documented contexts (stratigraphy). This analysis is a starting point for a discussion with hypotheses about the chronology and construction of the gate and fortification wall published by Z Klanica, Poulík and B. Kavánová in the second half of the 20th century. Finally, the paper presents an interpretation model about dating construction and decay of the fortifications in outer bailey of the Mikulčice agglomeration., Marek Hladík., and Obsahuje seznam literatury