Which preposition to use with philosophiae

of Occurrences 3%

" Alfred produced a work on moral philosophy, by altering and amending the De Consolatione Philosophiae of Boethius, a noble Roman who was brutally thrown into prison and executed about 525 A.D. In simplicity and moral power, some of Alfred's original matter in this volume was not surpassed by any English writer for several hundred years.

Which preposition to use with  philosophiae