This is a collection of opuscula by Eustathius, the Archbishop of Thessalonica in the 12th century, and two other Byzantine authors, Panaretus and Eugenicus. The opuscula deal with various topics, such as theology, rhetoric, and poetry, and reflect the intellectual and cultural richness of the Byzantine Empire. This edition is edited by T. L. F. Tafel, a German philologist and historian of the 19th century, and includes a critical apparatus and a commentary. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.