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The article describes the composition and content of archival documents stored in the Ukrainian archives and containing information on the institutional history of the diplomatic missions of Ukraine in Turkey and Turkey in Ukraine during the period of the Ukrainian Revolution of 1917–1921. The study of the Ukrainian-Turkish diplomatic relation history in 1917-1920 demands to research archival documents which are kept in the archives of Ukraine, Turkey, Poland, Austria, Canada and other countries. The Turkish scholars Khakan Kyrymly and Makhmet Farkhi Furat, the Ukrainian scientist and diplomat Bohdan Serhiichuk shed light on certain aspects of this topic in their scientific publications. A core set of documents reflecting the activity of Ukrainian mission in Turkey and Turkish mission in Ukraine is presented at the Central State Archives of Supreme Bodies of Power and Government of Ukraine (TsDAVO of Ukraine). The first part of this documents reflects the process of Brest peaceful negotiations. Signed at Brest-Litovsk on February 9, 1918 peaceful agreement of the Ukrainian National Republic with countries of the Quadruple Alliance (including the Ottoman Empire) became the beginning of Ukrainian-Turkish interstate relations in the 20th century. The Central State CinePhotoPhono Archives of Ukraine named after H. Pshenychnyi keeps photographs imaging the negotiation process and its participants. The set of documents, related to the activity of representatives of the Ottoman Empire in Kyiv, is preserved in the Central State Archive of Supreme Bodies of Power and Government of Ukraine. The Turkish diplomats arrived in Kyiv on September 8. On September 20, 2018 Consul Mahomet Ali Bei went to Odessa. Priority tasks of consuls had been considered as the protection of Turkish nationals and organization of the departure of civilians and released Turkish prisoners of war. Information about the activities of the Consulate of the Ottoman Empire in Odessa have been preserved in the Central State Archive of Supreme Bodies of Power and Government of Ukraine and in the State archives of Odessa Region. The information on the situation of Turkish nationals is contained in documents fund 4 (The National Commissariat of Foreign Affairs of the Ukrainian SSR) and fund 4205 (Office of the Plenipotentiary of the PCIA in Kyiv area). Archive information, placed in documents, preserved in Ukrainian and foreign archives, demonstrate perspectives for further surveys.