This textbook is dedicated to the scientific activities of scientists of the Middle Ages. The manual contains materials on academic discipline in the form of biographical data of scientists and fragments of their scientific works. The material is presented in chronological order from the VI to XIII centuries, before the Renaissance. The textbook meets the requirements of the state educational standard and is intended for teachers, graduate students and students of technical universities and secondary specialized educational institutions, as well as for specialists in the history of science and technology and a wide range of readers interested in this field of science.