THE FORMATION OF THE BASIC DIRECTIONS OF INTERACTION OF STATES ON ISSUES OF PRIVATE INTERNATIONAL LAW IN THE NINETEENTH CENTURY Tretyakova Ekaterina Sergeevna, PhD a t law, associate professor. <...> E-mail: es-tret@mail.ru Annotation Task: currently interest in the study of historical aspects related to the formation of various legal institutions is increased. <...> The least explored issues in the development of international law and international private law, including the article presents historical and legal analysis of the process of legal registration system of international relations in private law sphere, including with the direct participation of the Russian state. <...> Model: the study of historical and legal analysis of the process of formation of private international law in the Imperial period with the participation of the Russian state, based on primary sources: international legal instruments (treaties) concluded by Russia with different States for a specified period of time and acts of internal legislation regulating the corresponding sphere, and also the scientific works devoted to the study of relevant issues. <...> Conclusions: the Conducted historical and legal analysis, identified the main issues which have been subject to legal regulation in the international private law of the relevant period and identifies trends associated with the process of formation of private international law, describes the legal consolidation of the relevant provisions of the international treaties concluded by various, mainly European States as well as the ratio of provisions of international law acts of the Russian legislation. <...> Frameworks of research/possibility of subsequent use of results of scientific work: the study is limited to the time frame and scope of private international law that can be extended from the point of view of the chronological framework and areas of cooperation. <...> Social consequences: In systematic form, with links to primary sources, describes the process of becoming legal registration of interstate relations in the field of private law within a specified period of time, which makes a contribution to the study of the history of international law in General, including relevant political and legal processes. <...> Originality/value – the work can be used to study the history of state and law, private international law and other Sciences. <...> В настоящей статье проведен историко-правовой анализ процесса юридического оформления системы международных отношений в частно-правовой сфере, в том числе при непосредственном <...>