Proclus was one of the major Greek philosophers of late Antiquity. In his metaphysics he developed and systematized problems of Plato's thought, such as participation; transcendence - immanence; causation - participation - return; henads and monads; first and second causality. Before and after his works had been translated into Latin, Proclus influenced the Christian West through the _Liber the causis_, a Latin translation of an anonymous Arab version of Proclus' _Elementatio theologica_.

These are two of only three medieval treatises known to the editors explicitly devoted to discussion of concepts. That is not to deny that other works treat extensively of concepts among other matters.

It has been a long time ago since Professor De Rijk first drew our attention to an important Parisian manuscript containing two treatises on logic, both connected with the School of the 'Montani'. The school was established in the twelfth century on the Mont Sainte Genevieve (which is situated in what is nowadays known as the Quartier Latin). It was dominated by master Alberic (Albericus) of Paris. The 'Montani' were the heirs (faithful or not) of Pierre Abelard, Robert of Melun (...) and this master Alberic. The present work aims to provide a first working edition of one of the treatises in the manuscript, the 'Introductiones Montane Maiores'. This introductory work on logic contains a wealth of information about the way in which logic was taught and practiced in the schools of Paris of the twelfth century. It also gives insight into the vicissitudes of the teachings of different Parisian masters. The edition is preceded by an extensive introduction, with information about the origins and contents of the text and discussions of some interesting doctrinal elements. (shrink)

In this work, the papers are presented which, on the basis of L.M. de Rijk's monumental 'Logica modernorum' (1962-1967), sketch the development of medieval theories on meaning and reference from the beginnings well into the 17th century. The book also presents studies of these theories from a modern point of view.

Master Nicholas of Amsterdam was a prominent master of arts in Germany during the first half of the fifteenth century. He composed various commentaries on Aristotle’s works. One of these commentaries is on the logica vetus, the old logic, viz. on Porphyry’s Isagoge and on Aristotle’s Categories and On Interpretation. This commentary is edited and introduced here. Nicholas is a ‘modernus’ – as opposed to the ‘antiqui’, who were realists – which means that he is a conceptualist belonging to the (...) university tradition that accepted John Buridan (ca. 1300-1360 or 1361) and Marsilius of Inghen (ca. 1340-1396) as its masters. In medieval philosophy, a parallel between thinking and reality is generally upheld. Nicholas makes a sharp distinction between the two; this may be interpreted as a step towards a separation between the two realms, as is common in philosophy in later centuries. Other characteristics of Nicholas are that he defends the position that science has its place in a proposition, and does not simply follow reality. Furthermore, he emphasizes the part played by individual things. Fifteenth-century philosophy has hardly been studied, mainly because that century has long been considered unoriginal. Nicholas of Amsterdam certainly deserves the historian’s interest in order to evaluate how medieval philosophy prepared the way for modern philosophy. (shrink)

This anonymous source publication of a university discussion held in Prague about 1400 provides us with new information about medieval semantics after Peter of Spain and Richard Billingham. The edition is the basis of a partial reconstruction of Thomas of Cleves’ _Logica_.