Azo. Early in the thirteenth century Portius Azo stood at the
head of the Bolognese school of law which was accomplishing the resuscitation
of the classical Roman law. He was the pupil of the celebrated Johannes
Bassianus, and his fame so eclipsed all his contemporaries that in 1205
Thomas of Marlborough, afterwards Abbot of Evesham, spent six months at
Bologna hearing his lectures every day. Azo was saluted as Master of
all the Masters of the laws, and the highest praise that could be
given another canonist was to declare him to be second only to Azo.
Savigrey says that Azo was alive as late as 1230. His chief work is a
Summa of the first nine books of the Code, to which he added a
Summa of the Institutes. No less than thirty-one editions
appeared between 1482 and 1610; of which five are earler than 1500.
Throughout the Middle Ages these treatises were in highest respute.