As a method of teaching, the ancient law professors (so-called antecessores) used to write commentaries (sometimes mere translations) on all parts of Justinian's law. While Justinian's law was promulgated in Latin, these commentaries were written in Greek, because lawyers (students and practitioners) were hardly able to read Latin anymore.[4] Fragments of this commentary, which was in the Greek language, have been preserved in the Scholia appended to the body of law compiled by order of the emperor Basilius the Macedonian and his son Leo the Wise, in the 9th century, known as the Basilica.[5]