Uzbekistan is one of the countries with the oldest and rich architectural heritage in Central Asia. Today, more than two thousand medieval architectural monuments are kept under state protection in our country. Historical monuments in the cities of ancient Khiva, Bukhara, Samarkand and Shakhrisabz are included in the list of world cultural heritage of UNESCO. Currently, architectural secret symbolic decorations in these cities are almost unexplored, they are waiting for their solution. For example, the secret world of the secret decorations of the Sherdar madrasa, built in the 17th century in the Samarkand Registan, has been waiting for its solution for almost 400 years. The scientific hypothesis about the solution to the same problem is described in the monograph.This monograph is written for a large group of historians, architectures, artists, teachers and students of secondary and higher educational institutes as well as local people and tourists interested in national heritage of the Republic of Uzbekistan.