This document discusses the history and evolution of architectural photography. It provides biographies of influential photographers like Berenice Abbott, Eugène Atget, and Henri Cartier-Bresson who helped establish the genre. Their early work focused on static subjects but shifted to new forms of machinery, architecture, and the working classes. The document also discusses styles like "straight photography" that emphasized unmanipulated images to document subjects. Silhouettes, which were popular in portraits centuries ago, saw a rebirth in architectural photography to capture geometry and the play of light through shadows and reflections.