The __ is an egyptian architectural innovation to enable sunlight to enter a large roofed interior space.

1. monumental entrance gate open forum space (Area Fori) 2. Basilica Apia in the colosseum with the two libraries in the two libraries after trajans fam, trans verse axis, influence from military architecture principium headquarters for general standards of roman army designed like a triumphal arch conquest/victory nave two side aisles, Egyptian granite civic structures roofed rectagular wide ...

Explanation:

changeable lenses of different focal lengths allows light to enter the camera,which then forms the image on light-sensitive film;