Artificial neuronal networks open up radical new pathways for image creation. On the basis of textual prompts, machine-learning algorithms like Midjourney and Stable Diffusion generate imagery that is simultaneously familiar and alien. Graphic designer Floyd Schulze uses this rapidly developing technology to recreate architectural icons. In an accompanying essay, Georg Vrachliotis takes up the topic on the theoretical level. Hey Computer! is the first book to deal with AI-generated architectural imagery from an artistic perspective.