His ecclesiastical standing was so good that in 1583 he was elected bishop, but his accession to the see was so strongly opposed by the doge and the senate that he consented to retain the appointment of St. Mark's, where he remained until his death in 1590. Zarlino was very famous as a composer, in his own day, but few of his works have come down to us. He is best known by certain works of his on harmony and the theory of music, of which the most important was the _Institutioni Armoniche_ (Venice, 1558), and his _Demonstrationi Armoniche_ (Venice, 1571). Zarlino's distinction rests upon his having restored the true tuning of the tetrachord to that of 8:9, 9:10, 15:16, as opposed to the Pythagorean tuning of 9:8, 9:8, 256:243. He was the most important scientific authority in the music of the new epoch. His discoveries in harmony were afterward supplemented by those of Tartini, almost two centuries later. Among other strong points of Zarlino was his demonstration of equal temperament, which came into general use about 100 years later. Cypriano de Rore, whose name was mentioned above in connection with St. Mark's, held a position as master in that eminent cathedral only one year, his tenure of office falling between the death of Willaert and the appointment of Zarlino. He was a very prolific composer of motettes and madrigals, and after resigning his position at St. Mark's went to the Court of Parma, where he died at the age of forty-nine. The later eminent masters holding positions in this church will come into view in the next book, in connection with the opera, for Monteverde was director of the music here during the greater part of his career as a dramatic composer. The most eminent development of the polyphonic school, and at the same time the dawn of a better era in church music, took place in Rome, where the influence of the Netherlandish composer is noticeable. Claude Goudimel, whose name appears in the table of the Netherlandish school in the preceding chapter, opened a music school in Rome in the early part of the sixteenth century, and among his pupils was the name of Palestrina. Goudimel's residence in Rome was not very long. He afterward returned to Paris, and in some way was connected with Calvin in preparing psalm books for the Calvinists. He was killed finally at Lyons in the massacre of St. Bartholomew, August 24, 1572.