The Architect is the designer of the dream space into which a dreamer brings a subject. An architect is similar in this regard to a video game designer, with the dream representing different levels within the game, complete with all the aesthetic and tactile details. The subject is brought into that dream space and fills it with details from their own subconscious and memories.
The architect does not have to design using real world architecture and physics, allowing them to create paradoxes like an endless staircase.
When bringing a mark into the dream, a skilled architect is essential to help the dreamer make the dream feel real. Furthermore, an architect can help design mazes or other secure locations in which the mark hides his or her secrets. The mark subconsciously hides his or her secrets in a secure location, and the deeper or more important the secret, the better or more secure the location must be in order to lure the mark into populating it with their secrets.
The architect often fulfills the role of the dreamer during a heist, but the architect can also teach their designs to another to dream.