The discoveries of Johann Kepler and Bonaventura Cavalieri were the foundation upon which Sir Isaac Newton and Gottfried Wilhelm Leibnitz erected that wonderful edifice, the Infinitesimal Calculus.
The exact relation between the two was, however, a matter of controversy, Aquinas and Duns Scotus holding that both are practical reason, while Bonaventura narrows synderesis to the volitional tendency to good actions.
Several events of his pontificate are noteworthy: he granted many privileges to the mendicant orders, especially to the Franciscans; he endeavoured to suppress abuses in the Spanish Inquisition; he took measures against the Waldenses; he approved (1475) the office of the Immaculate Conception for the 8th of December; in 1478 he formally annulled the decrees of the council of Constance; and he canonized St Bonaventura (14th of April 1482).
Fully a century later, when the system of scholasticism was gradually breaking up under the predominance of Occam's nominalism, Pierre d'Ailly (1350-1425), and his more famous scholar John Gerson (1363-1429), chancellor of the university of Paris, are found endeavouring to combine the doctrines of the Victorines and Bonaventura with a nominalistic philosophy.
Even in the middle ages there were not wanting those - the St Victors, Bonaventura - who sought to vindicate mystical if not moral redemption as the central thought of Christianity.
The book practically discarded all the ideas and practices concerning Indulgences which had come into the medieval church since the beginning of the 13th century, and all the ingenious explanations of the scholastic theologians from Bonaventura and Thomas Aquinas downwards.
But neither of them is a copy, as Friar Bonaventura in Ford's second play may be said to be a copy of Friar Lawrence, whose kindly pliability he disagreeably exaggerates, or as D'Avolos in Love's Sacrifice is clearly modelled on Iago.
In its more moderate form, keeping wholly within the limits of ecclesiastical orthodoxy, this mysticism is represented by Bonaventura and Gerson; while it appears more independent and daringly constructive in the German Eckhart, advancing in some of his followers to open breach with the church, and even to practical immorality.
It is generally held that he taught Bonaventura, Duns Scotus and Thomas Aquinas, but a comparison of dates makes it clear that the two latter could nothave been his pupils and that the statement about Bonaventura is open to doubt.
In 1619 it was captured by the imperialist general, Karl Bonaventura de Longueval, Graf von Buquoy, and suffered so severely that the citizens opened their gates to his opponent, Ernst von Mansfeld.