General Harry Trexler, one of the principals of the Lehigh Valley Transit Company and a prominent businessman, was the principal behind the consolidation of smaller utilities into forming the Pennsylvania Power and Light Company as an amalgamation of the smaller power companies in 1920. His vision for the company's headquarters was a grand building in Allentown, his home and location for his business interests. In this photo taken in March 1927, the steel for the structure is being put in place and the fifth story of the building's steel is beginning to be erected.