The article examines the historical and legal aspects of the formation and development of the oldest scientific centers of Kyivan Rus at the end of the 10th and beginning of the 12th centuries. Art., as well as the economic and legal regime of their property. It has been studied that in Kyivan Rus, as one of the powerful states of Europe in the IX–XII centuries. starting from the 10th century a significant development of education, literature and science was observed, which is connected with the Baptism of Vladimir the Great of Russia, the introduction of Byzantine, canonical law and the formation of the original ancient Russian state and legal thought. It has been established that education and science gained special development under Grand Duke Yaroslav the Wise at the end of the 10th century. and the formation of the first national science center in Ukraine – the academic center «Yaroslav Academy», which was established at Sophia Cathedral in 1037. It was found that the activities of the «Yaroslav Academy» were based on both national traditions and the use of ancient and Bulgarian-Byzantine experience. It was noted that the activities of the «Yaroslav Academy» were characterized by the presence of a spectrum of scientific directions: translation activities, creation of own literary works and the first legal monuments («Pravda Ruska»). It has been established that the «Yaroslav Academy» should be considered the first scientific academic environment on the territory of medieval Ukraine, which operated in the format of reviving and spreading scientific knowledge and creating its own scientific works. It is noted that one of the important issues of the Yaroslav Academy’s activities is the study of the economic and legal regime of its property. The article analyzes the legal regulation of land ownership, including the land ownership of the church (Kyiv Metropolis). It was found that the institution of the metropolis provided for the right to independent church-administrative activity in the internal affairs of its diocese. It was established that the management of church property was carried out in accordance with the church statutes. It was concluded that the economic management of the property of the «Yaroslav Academy» was carried out by the Kyiv Metropolitanate, which had the right to manage church property, which was formed at the expense of the «princely tithe», which was deducted in favor of the Church (Kyiv Metropolis) and profits from «church courts».