<p>The Art Deco Gulf Tower in Pittsburgh.
</p><p>We begin our slideshow of Pittsburgh with architecture.  This is the top of the Gulf Tower which was built by Gulf Oil (long before it became part of Chevron).
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Wikipedia has this to say:  [The Gulf Tower was] designed by the firm of Trowbridge &amp; Livingston and completed in 1932 at a cost of $10.05 million ($140.4 million today). Now called Gulf Tower, it has 44 floors and rises 177.4 m (582 ft) above Downtown Pittsburgh. The crown of the skyscraper is modeled after the Mausoleum of Halicarnassus in the style of a step pyramid. The building was listed as a Pittsburgh History &amp; Landmarks Foundation Historic Landmark in 1973.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/16069488@N00">David Brossard</a>
CC BY-SA 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/string_bass_dave/10425913686/">Pyramid Scheme</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:GrapedApe" title="User:GrapedApe">GrapedApe</a></li></ul>