The Shishkin Manuscripts, also known as the Shishkin Petroglyphs, are a significant archaeological site located along the Lena River in the Kachugsky District of the Irkutsk Oblast. This extensive complex of rock art is situated on sheer cliffs rising above the riverbank, representing one of the most important and largest concentrations of ancient petroglyphs in Siberia. The site features thousands of individual images created over a vast chronological span, from the Neolithic era to the Middle Ages. The petroglyphs depict a wide variety of subjects, including animals such as moose, deer, and birds, as well as anthropomorphic figures, hunting scenes, and symbolic motifs. These rock carvings provide invaluable insight into the spiritual beliefs, mythology, and daily life of the ancient populations that inhabited the Baikal and Lena River regions. The site's name is derived from the nearby village of Shishkino. Due to its immense cultural and historical value, the area is protected as a cultural heritage site and a nature reserve, safeguarding both the archaeological monuments and the surrounding natural landscape. The preservation of the petroglyphs is an ongoing concern, as they are subject to natural erosion and other environmental factors.