The sky-squares are the institutions that provide both military and socio-cultural services within the structure of the period. In the cities of the Seljuk Empire, the squares gave a regular service in the administration of the officer. In the settlements near the Seljuk fortresses, they also served under the control of the court of residence under the Castle Guard. In the Turkish tribes outside the settlement areas, both military and socio-cultural activities continued in the tradition of decentralized management coming from the Turkic Khaganate and in open and closed upland and winter sports houses. On the other hand, the understanding of power and other states to accept them to make the Seljuk Empire connected to the power of the country as well as seize the trade routes, an important element of the economy seized the trade routes to hold and to organize the commercial activities in a comfortable, easy and safe way, The Seljuk Empire determined its bio-policy on the people of the country as "to be the best fighting society ". To reach the determined bio-policy, it has used all its facilities in an organized way. The Seljuk Empire has achieved this goal thanks to the sky-squares. In addition to military physical education, Sky-squares, which was opened to the use of people living in the city on certain days of the week, contributed both to the activity of the people in various sports branches and to the establishment of the enterprises that produce the sports branch of their interest and to the Seljuk economy.