Written or Spoken content used to communicate, disseminate, and advance aspects of building theory, history, and design.

︎ Treatise
A treatise is a written discourse about a subject that provides a survey of current knowledge. Vitruvius’ Ten Books on Architecture is the oldest surviving and one of the best-known examples of such architectural document.
The manifesto is a declaration of belief. Often political in its agenda, it claims a position and prescribes changes the author believes should be made. Similar to the treatise, it often includes a survey of current knowledge but differs in its deliberate intention to persuade and call to action.
Monograph The monograph is a survey of an architect’s or architectural firm’s work. Originally developed as a professional portfolio, and written by architects themselves, it is rooted in self promotion. While the primary focus of the monograph is the architectural work rather than their life and teachings but many monographs will include a biographical essay often as part of the introduction. 
Discursive Monologue Most contemporary architectural writing falls under the category of the discursive monologue. Appearing in both book length and short-form essays, they respond to current issues and can be quickly consumed and disseminated through magazines and online journals .