These 19th century views illustrate features of traditional Cairene residential architecture such as  the mashrabiyya  ( projecting balconies enclosed by wooden latticework),  elaborate masonry details, and arcaded courtyards.
Source:
Depaule, Jean-Charles. 1985.  Actualité de l'habitat ancien au Caire.  Cairo:  Centre d'Études et de Documentation Économiques Juridiques et Sociales.