The Great God Pan
The Great God Pan is a horror and fantasy novella by Welsh writer Arthur Machen. Machen was inspired to write "The Great God Pan" by his experiences at the ruins of a pagan temple in Wales. What would become the first chapter of the novella was published in the magazine "The Whirlwind" in 1890. Machen later extended "The Great God Pan" and it was published as a book alongside another story, "The Inmost Light", in 1894. The novella begins with an experiment to allow a woman named Mary to see the supernatural world. This is followed by an account of a series of mysterious happenings and deaths over many years surrounding a woman named Helen Vaughan. At the end, the heroes confront Helen and force her to kill herself. She undergoes a series of supernatural transformations before dying and she is revealed to be the child of Mary and the god Pan.
Ars Magna (Gerolamo Cardano)
The Ars Magna ("The Great Art") is an important Latin-language book on algebra written by Gerolamo Cardano. It was first published in 1545 under the title "Artis Magnæ, Sive de Regulis Algebraicis Liber Unus" ("Book number one about The Great Art, or The Rules of Algebra"). There was a second edition in Cardano's lifetime, published in 1570. It is considered one of the three greatest scientific treatises of the early Renaissance, together with Copernicus' "De revolutionibus orbium coelestium" and Vesalius' "De humani corporis fabrica". The first editions of these three books were published within a two-year span (1543–1545).