Berytus had a monumental "Roman Gate" with huge walls (recently discovered) and was a trade center of silk and wine production, well connected by efficient Roman roads to Heliopolis and Caesarea. According to Kevin Butcher, the Latin character of Berytus remained dominant until the fifth century: the city was a center for the study of Latin literature and -after Septimius Severus- of Roman Law. Under Nero the son of a roman colonist, Marcus Valerius Probus (born in Berytus around 25 AD), was known in all the empire as a Latin grammarian and literature master philologist.