"But what was it that contributed very much to the production of those works? It was not the profound studies of Raphael's mind, but the spirit of the age which warmed those studies.--It was a great age, in which learning and science were become diffused, at least throughout Europe:--a great age replete with characters studious of philosophy; and, therefore, fond of the instruction conveyed by the arts;--fond of those high and more profound compositions which entered into the spirit of superior character, and made some study and research necessary to develope their beauties. To meet the taste of such an age, the two first public works of Raphael, above mentioned, were well suited, inasmuch as they were intended to convey the comparative views of theology and human science, or, in other words, the improvement of the human mind arising from the two great sources of national wisdom and revealed light. It must not also be forgotten, that while the spirit of the age was warming his mind to the peculiar dignity of theme and style which marks his works, the generous and noble patronage of the papal court was exerting its utmost power to immortalise him, and every other great master that arose within the circle of its influence. Their merit and their fame found as animated a protector in Leo X. as Phidias experienced in Pericles, or Apelles in Alexander the Great. "As the Florentine and Roman schools were thus gradually refined in the excellence of design and character, by the aid of philosophical studies; so the Venetian masters were equally indebted to the like studies, without which, they would never have reached their admirable system of colouring. If any have conceived otherwise, they have taken a very superficial view of their system. Where is there greater science concerned than in the whole theory of colours? It employed the investigation of Newton; and shall that pass for a common or easy attainment which took up so much of his profound studies? The Venetian masters had been long working their way to the radical principles of this science, not only for a just and perfect arrangement of their colouring, but for that clear and transparent system in the use of it, which have equally marked that school in the days of its maturity under Titian. He it was who established, on unerring principles, founded on nature and truth, that accomplished system which John Bellini had first laboured to discover, and in which Giorgioni had made further advancements. Besides his zeal in his profession, Titian was born in that higher rank of life which might be supposed to give him an easier access to the elegant studies of philosophic science; and he had prosecuted, with great ardour, the science of chemisty, the better to understand the properties of colour, their homogeneous blendings, purity, and duration; as well as the properties of oils, gums, and other fluids, which might form the fittest vehicles to convey his colours upon canvass.