agreement of Passan, should be legally recognized by a decree of the Diet, and the equality of the Catholic and Lutheran religions accepted. This was done at Augsburg in 1555. Charles then requested the electors to accept his abdication and to elect Ferdinand his successor. This was done on 28 February, 1558. Shortly after the final decree of the Diet of Augsburg, in 1555, Charles convened the Estates of the Netherlands, and in their presence transferred the government to Philip. Three months later (16 January, 1556) he transferred the Spanish Crown to his son. In spite of this he could not free himself from political cares. It was September, 1556, before he could leave for his long-chosen place of retirement in Spain, accompanied by his two sisters, the widow of the French king, and Maria of Hungary. But he did not live a monastic life even at Yuste. Messengers with political despatches came to him every day. However, he took no active part in affairs. He lived his few remaining months on earth amid works of art, of which he had a keen appreciation (Titian was his favourite painter), amid the books which, as a cultured man, he studied and took pleasure in, and enjoying the music which he loved, while he prepared himself for the life to come....