Breath is the sacred book of Architecture. It contains the revelations, messages, and histories of the 72 Makers — individuals selected by the Architect to hone revealed wisdom — alongside compiled scripture of Earth's great religious traditions, a five-part scientific testament, and prophetic and apocalyptic texts composed over two centuries of human expansion into the Sol System.

The text was first published during the lifetime of the first Maker, Faberfilia, under the title Spirit, in 107 BSC. Two years later, upon Faberfilia's death, the second generation of Makers republished it under its permanent name: Breath. The renaming reflects a central theological claim — that the Architect breathes revelation outward to all peoples and all persons — and carries an intentional pun preserved in both the original Hebrew and Greek: the same word denotes breath, spirit, and wind.

The version of Breath extant prior to the Solar War — effectively the closed canon — was compiled and commented upon by Theodosius, who considered himself the Last Maker. He did not alter the prior text but contextualized it within the longest span of Maker history available to him.

Architecture describes the book's purpose in its own preface: "a science of religion" — not a religion in the conventional sense, but an account of reality that integrates worship, ethics, philosophy, and scientific inquiry as aspects of a single unified pursuit. Nearly all Makers wrote under pseudonyms, emphasizing the collective authority of wisdom over the individual authority of name.