About this time Rubens painted some of his greatest works. "Our Saviour giving the Keys to St. Peter" was originally placed in the Cathedral of St. Gudule; it was sold in 1824 to the Prince of Orange, for one hundred and twenty-five thousand dollars. An "Elevation of the Cross," an immense picture, executed for the Church of St. Walburg, at Antwerp, is now in the north transept of the cathedral. He painted an "Adoration of the Magi" for the choir of the Abbey Church of St. Michael, dear to him from the burial of his mother and his own marriage, and a similar picture for the Church of St. John at Malines. Of an "Adoration of the Magi" in the Museum at Antwerp, Eugène Fromentin says: "It is truly a _tour de force_, especially if one recalls the rapidity of this work of improvisation. Not a gap, not a strain; a vast, clear half-tint and lights without excess envelop all the figures, supporting one the other; all the colors are visible and multiply values the most rare, the least sought and yet the most fit, the most subtle and yet the most distinct. By the side of types that are very ugly swarm superior types. With his square face, his thick lips, his reddish skin, big eyes strongly lighted up, and his stout body girt in green pelisse with sleeves of peacock blue, this African among the Magi is a figure entirely new, before which, assuredly, Tintoretto, Titian, Veronese would have clapped their hands. "On the left stand in dignified solemnity two colossal cavaliers of a singular Anglo-Flemish style, the most extraordinary piece of color in the picture, with its dull harmony of black, greenish blue, of brown and white. Add the profile of the Nubian camel-drivers, the supernumeraries, men in helmets, negroes, the whole in the most ample, the most transparent, the most natural of atmospheres. Spider-webs float in the framework, and quite low down the head of the ox,--a sketch achieved by a few strokes of the brush in bitumen,--without more importance and not otherwise executed than would be a hasty signature. The Child is delicious; to be cited as one of the most beautiful among the purely picturesque compositions of Rubens, the last word of his knowledge as to color, of his skill as to technique, when his sight was clear and instantaneous, his hand rapid and careful, and when he was not too exacting, the triumph of rapture and science--in a word, of self-confidence." Rubens had courage. He used to say: "Every one according to his gift; my talent is such that never yet has an undertaking, however extraordinary in size or diversity of subjects, daunted my courage." The "Assumption of the Virgin" in the Antwerp Cathedral, Dr. Waagen says, "may be said to produce the same effect as a symphony, in which the united sounds of all the instruments blend together joyously, divinely, mightily. No other painter has ever known how to produce such a full and satisfactory tone of light, such a deep chiaro-oscuro united with such general brilliancy."