BOETHIUS of Dacia. - Scholastic philosopher of the 13th century about whom little is known. He was neither a Dominican nor a religious nor a priest, but a simple cleric, professor in the faculty of arts at the University of Paris where, together with Siger of Brabant, he taught Latin Averroism. Involved with the latter in the condemnation of Latin Averroism by the Bishop of Paris, Stephen Tempier, in 1277, he had to appear before the Roman court. Tried and condemned to perpetual imprisonment as a heretic who had relapsed, he died in prison before 1284.
According to some, he would have commented on all of Aristotle, but he is best known as the author of various Questions on grammar, logic, and natural philosophy such as *De modis significandi*, *Sophismata logicalia*, *Quaestiones super Topica Aristotelis*, *Super librum physicorum quaestiones*. Grabmann discovered two other treatises, namely *De somno et vigilia* and *De summo bono sive de vita philosophi*, in which the study of philosophy is presented as the supreme happiness of man, with the omission, if not the outright exclusion, of the supernatural aspect of beatitude.