One Liberty Place (skyscraper skyline photos)

One Liberty Place is a 61-story skyscraper completed in 1987 that broke the informal height tradition that had kept Philadelphia's skyline lower than the William Penn statue atop City Hall. Its angled glass silhouette and prominence on Market Street have made it an enduring backdrop for city skyline photography and aerial shots. The building remained the city's tallest structure until 2007 and continues to appear in widely shared images of Philadelphia's skyline.