The Creation structure but may be written by an unknown author. Back in Vienna, Haydn passed it to his friend and sponsor Baron Gottfried van Swieten, who translated and organized it. The sources for the libretto are the two Creation narratives from the Book of Genesis, some Psalms, and John Milton's "Paradise Lost", an epic poem in ten volumes, first published in 1667. The libretto is structured in three parts, the first dealing with the Creation of the universe and the plants, the second with the Creation of the animals, and of man and woman, and the third with Adam and Eve in
The Four Seasons (Vivaldi) as follows: There is some debate as to whether the four concertos were written to accompany four sonnets or vice versa. Though it is not known who wrote the accompanying sonnets, the theory that Vivaldi wrote them is supported by the fact that each sonnet is broken into three sections, each neatly corresponding to a movement in the concerto. Regardless of the sonnets' authorship, "The Four Seasons" can be classified as program music, instrumental music intended to evoke something extra-musical, and an art form which Vivaldi was determined to prove sophisticated enough to be taken seriously. In addition to these