Complex sentence: Priscianus Caesariensis (fl.500 AD), commonly known as Priscian was a Latin grammarian who wrote the "Institutiones grammaticae" ("Grammatical Foundations") on the subject.
Split into simpler sentences: Priscianus Caesariensis (fl.500 AD), commonly known as Priscian was a Latin grammarian. He wrote the "Institutiones grammaticae" ("Grammatical Foundations") on the subject.