Baldus de Ubaldis

A member of the noble family of the Ubaldi (Baldeschi), Baldus was born at Perugia in 1327, and studied civil law there under Bartolus de Saxoferrato, being admitted to the degree of doctor of civil law at the early age of seventeen.

Baldus' view on the legal issues relating to the schism are laid down in the so-called Questio de schismate.

His Commentary on the Libri Feudorum, a twelfth-century compilation of feudal law provisions, is considered to be one of his best works.

In addition to these commentaries, Baldus wrote a number of treatises on specialised legal topics.

Baldus's work on the law of evidence and the gradations of proof was a high point of medieval thought in the discipline and remained the standard treatment of the subject for centuries.