Photo crop exposure date: unknown.
Exposure date (or window) of subject photo: 1858 – 1977
Subject: Photo crop of Main Plaza. View is ESE. Taken from a point in the plaza showing an adobe building at the SW corner of Main Plaza and Dwyer Street marked POST OFFICE and the French Building (1858) at the SE corner of Main Plaza and Dwyer. The Gallagher Building on Alamo Plaza became the US Post Office upon its completion in 1877.