We came across this photo at the Library of Congress (how meta). Click on it for greater detail.

Construction of the Library of Congress, Washington, D.C., May 10, 1893
Construction of the Library of Congress, Washington, D.C., May 10, 1893
[Click here for larger version.]
Tom founded Ghosts of DC on January 4th, 2012 as a blog to uncover the lost and untold history of Washington, D.C. He has lived in the city for over a decade and loves exploring every corner of the District.