View of the Carnegie Building (opened 1895, architects Longfellow, Alden &amp; Harlow) in 1905, by photographer John C. Bragdon
John C. Bragdon
<i>Pittsburgh and Allegheny Picturesque,</i> 1905 (<a rel="nofollow" class="external free" href="https://archive.org/stream/pittsburghallegh00pitt#page/n11/mode/1up">https://archive.org/stream/pittsburghallegh00pitt#page/n11/mode/1up</a>)