In the sixteenth century there lived in Hungary one Francis David, a man learned in the arts and languages, but his inconstancy and fickleness of mind led him into diverse errors, and brought about his destruction. He left the Church, and first embraced Calvinism; then he fled into the camp of the Semi-Judaising party, publishing a book _De Christo non invocando_, which was answered by Faustus Socinus, the founder of Socinianism. The Prince of Transylvania, Christopher Bathori, condemned David as an impious innovator and preacher of strange doctrines, and cast him into prison, where he died in 1579. There is extant a letter of David to the Churches of Poland concerning the millennium of Christ. Our next author was a victim to the same inconstancy of mind which proved so fatal to Francis David, but sordid reasons and the love of gain without doubt influenced his conduct and produced his fickleness of faith. Antonio de Dominis, Archbishop of Spalatro, was a shining light of the Roman Church at the end of the sixteenth century. He was born in 1566, and educated by the Jesuits. He was learned in history and in science, and was the first to discover the cause of the rainbow, his explanation being adopted and perfected by Descartes. The Jesuits obtained for him the Professorship of Mathematics at Padua, and of Logic and Rhetoric at Brescia. After his ordination he became a popular preacher and was consecrated Bishop of Segni, and afterwards Archbishop of Spalatro in Dalmatia. He took a leading part in the controversy between the Republic of Venice and the Pope, and after the reconciliation between the two parties was obliged by the Pope to pay an annual pension of five hundred crowns out of the revenues of his see to the Bishop of Segni. This highly incensed the avaricious prelate, who immediately began to look out for himself a more lucrative piece of preferment. He applied to Sir Dudley Carleton, the English Ambassador at Venice, to know whether he would be received into the Church of England, as the abuses and corruptions of the Church of Rome prevented him from remaining any longer in her communion.