SYMPHONY HOUSE IS THE TALLEST building on Broad Street south of Pine Street. If you are travelling north on Broad from South Philadelphia, the 31 story-condominium tower is the first Center City skyscraper you notice. Although it seemed like construction on the project took forever, it wasn't until it opened last month that the buildings true impact on the skyline was noticable. That's when the night lights were turned on. Suddenly, from certain perspectives, it seems as if Center City had taken a giant step southward.