This was Lucas Paciolus (Lucas de Burgo), a Minorite friar, who, having previously written works on algebra, arithmetic and geometry, published, in 1494, his principal work, entitled Summa de Arithmetica, Geometria, Proportioni et Proportionalita.
Of other buildings may be mentioned the Library, with upwards of 80,000 printed books and many valuable MSS., the stately palace with its gardens and orangery, the former Benedictine nunnery (founded 1625, and now used as a seminary), and the Minorite friary (1238) now used as a furniture warehouse.
St Martin's, built between the 10th and 12th centuries, has a fine baptistery; St Gereon's, built in the 11th century on the site of a Roman rotunda, is noted for its mosaics, and glass and oil-paintings; the Minorite church, begun in the same year as the cathedral, contains the tomb of Duns Scotus.
Shortly after his return Odoric betook himself to the Minorite house attached to St Anthony's at Padua, and it was there that in May 1330 he related the story of his travels, which was taken down in homely Latin by Friar William of Solagna.
The conferring of the imperial crown by the Roman populace, the deposition of the pope by the same body, and the election of an anti-pope in the person of the Minorite Pietro da Corvara, translated into acts the doctrines of the defensor pacis.
After installing himself in the Vatican, Louis got himself crowned by the deputies of the Roman people; instituted proceedings for the deposition of John, whom the Roman people, displeased by the spectacle of the papacy abandoning Rome, declared to have forfeited the pontificate (April 18, 1328); and finally caused a Minorite friar, Pietro Rainalucci da Corvara, to be elected pope under the name of Nicholas V.
Another attempt by Adam Newton, guardian of the Friars Minorite at Berwick, had a more ignominious result.
This step helped his studies, for he was sent to Tubingen in 1496 and became a favourite pupil of the guardian of the Minorite convent there, Paulus Scriptoris, a man of considerable general learning.
On returning to Ruffach, he taught gratis in the Minorite convent school that he might borrow books from the library, and in his sixteenth year resolved to become a friar.
Cheruel's admirable Histoire de France pendant la minorite de Louis XIV., 4 vols.