Cassiano has been modernized; it possesses interesting reliquaries, and contains the tomb of Petrus Chrysologus, archbishop of Ravenna (d.
This doctrine is already to be found in Petrus Aureolus, a Franciscan trained in the Scotist doctrine, and in William Durand of St Pourgain (d.
Salembier, Petrus de Alliaco (Lille, 1886); H.
A ducal commission, appointed to find a means for ending the interminable strife between the rival academic parties, entrusted Eck with the preparation of fresh commentaries on Aristotle and Petrus Hispanus.
That on geography is particularly good, and is interesting as having been read by Columbus, who lighted on it in Petrus de Alliaco's Imago Mundi, and was strongly influenced by its reasoning.
According to Emile Charles (Roger Bacon sa vie, ses ouvrages, ses doctrines, 1861), Peter of Maricourt is the Pierre Peregrin (or Pelerin) de Maricourt (Meharicourt in Picardy), known also as Petrus Peregrinus of Picardy, one of whose letters, De magnete, is partly reproduced in Libri's Hist.
A counterattempt over against Joachim to interpret Revelation in the light of history was made by Nicolas of Lyra (1329, in his Postilla), following (?) therein the lead of Petrus Aureolus (1317).
Of other writers who published works about the end of the 16th century, we may mention Jacques Peletier, or Jacobus Peletarius (De occulta parte Numerorum, quam Algebram vocant, 1558); Petrus Ramus (Arithmeticae Libri duo et totidem Algebrae, 1560), and Christoph Clavius, who wrote on algebra in 1580, though it was not published until 1608.
It was popular in the middle ages, hexameter abridgments being current under the names of Theodericus and Petrus Diaconus.
Apart from modern European savants and historians, and the more strictly Oriental chroniclers who have written in Persian, Turkish or Arabic, the following authorities may be cited - Laonicus Chalcondylas, Joannes Leunclavius, Joachimus Camerarius, Petrus Perondinus, Lazaro Soranzo, Simon Mairlus, Matthew Michiovius.