Around 1200, the lawyers were looking for a balance between the two authorities: the one of the lawmakers and the one of the existing law.
With the help of the articles here uploaded, and the images from the manuscripts (and a lot of patience) we will be doing a general, mainly superficial reading of the work of Opicinus of Canistris, a priest and notary at the papal court of Avignon, born in Pavia in 1296.
The traditional division of the liberal arts in seven, implies an internal division in two branches, called respectively trivium and quadrivium, the way of three, and the way of four.