a burial ground 6 km southeast of the station of Uibat in the Khakass Autonomous Oblast. The burials date from the third century B.C. to the seventh or eighth century A.D. The oldest burials are from the Tagar culture; most are from the Tashtyk culture. Burials of the Tashtyk clan tribal aristocracy, dating from the first century B.C. to the fifth century A.D., were excavated by S. V. Kiselev, L. A. Evtiukhova, and others in 1936 and 1938. They yielded numerous objects, including lifelike gypsum and terra-cotta burial masks and carved wooden sculptures. Enisei Kirghiz barrows, dating from the seventh and eighth centuries, a period in which feudal relations were established, yielded carved wooden ram figurines covered with gold leaf, a small silver pitcher with an Orkhon-Enisei inscription, and other objects.
The finds from Uibat Chaatas are art important source for the study of the rise of class society in ancient Siberia.