Boris A. Turaev as a historian and philologist significantly expanded the source base of Ethiopian studies all over the world. At the turn of the XIX–XX centuries he became an innovator in this highly conservative field of humanitarian knowledge. He continued the tradition of teaching the Geez language established by B. A. Dorn at the Faculty of History and Philology of St. Petersburg University. Boris A. Turaev was known as a connoisseur of liturgy and a deeply religious person. Ethiopia attracted him, first of all, as one of the most ancient Christian countries, which preserved the faith in Christ throughout all its documented history. The scientist focused his research on the liturgical and hagiographic literature of the Ethiopian Church. An overview of his works, in whole or in part touching on the topic of Ethiopia and its studies is here presented. The most part of these works are still relevant.