The architecture of the ancient cities of Uzbekistan with an average size remains unexplored. However, their historical planning structure, religious monuments, dwellings and defensive structures also had local features and traditions. This study is devoted to identifying the uniqueness of the defensive systems of the ancient city of Nurat. Defensive walls and towers, being the infrastructure of the city, had a direct relationship with the historical structure of the city, with its streets, squares, residential quarters, and also provides information about the historical, economic and social life of the population. By summing up various considerations and the features of the place above, we can say that the first protective structures of the ancient city of light appeared on the eve of the V-IV centuries BC. The defense system of the city of Nur, on the other hand, was extremely powerful, consisting of three parts: the defense wall of the fortress of Nur, the defense walls of Shahristan, the defense walls of Rabot - Pirosta.