From this time forward fortune showered upon him a combination of conditions highly favorable to rapid development. Severe training, ardent friendship, the society of the first composers, and incessant practice were vouchsafed him. As the pupil of the great organist Zachau, he studied the whole existing mass of German and Italian music, and soon exacted from his master the admission that he had nothing more to teach him. Thence he went to Berlin to study the opera-school, where Ariosti and Bononcini were favorite composers. The first was friendly, but the latter, who with a first-rate head had a cankered heart, determined to take the conceit out of the Saxon boy. He challenged him to play at sight an elaborate piece. Handel played it with perfect precision, and thenceforward Bononcini, though he hated the youth as a rival, treated him as an equal. On the death of his father Handel secured an engagement at the Hamburg opera-house, where he soon made his mark by the ability with which, on several occasions, he conducted rehearsals. At the age of nineteen Handel received the offer of the Luebeck organ, on condition that he would marry the daughter of the retiring organist. He went down with his friend Mattheson, who it seems had been offered the same terms. They both returned, however, in single blessedness to Hamburg. Though the Luebeck maiden had stirred no bad blood between them, musical rivalry did. A dispute in the theatre resulted in a duel. The only thing that saved. Handel's life was a great brass button that shivered his antagonist's point, when they were parted to become firm friends again. While at Hamburg Handel's first two operas were composed, "Almira" and "Nero." Both of these were founded on dark tales of crime and sorrow, and, in spite of some beautiful airs and clever instrumentation, were musical failures, as might be expected. Handel had had enough of manufacturing operas in Germany, and so in July, 1706, he went to Florence. Here he was cordially received; for Florence was second to no city in Italy in its passion for encouraging the arts. Its noble specimens of art creations in architecture, painting, and sculpture, produced a powerful impression upon the young musician. In little more than a week's time he composed an opera, "Rodrigo," for which he obtained one hundred sequins. His next visit was to Venice, where he arrived at the height of the carnival. Whatever effect Venice, with its weird and mysterious beauty, with its marble palaces, facades, pillars, and domes, its magnificent shrines and frescoes, produced on Handel, he took Venice by storm. Handel's power as an organist and a harpsichord player was only second to his strength as a composer, even when, in the full zenith of his maturity, he composed the "Messiah" and "Judas Maccabaeus."