manufacturing in the world between the mid-19th and mid-20th centuries, and North Philadelphia is one of the sections of the city whose landscape was most deeply shaped by the industrial era. Its landscape still strongly reflects this heritage. As the industrial age peaked in America, North Philadelphia became a working man's town. Upper North Philadelphia, Olney, Brewerytown, became major hubs of production. Large factories and industrial complexes were erected, covering vast swaths of city land. Thousands of row homes were constructed to house the burgeoning worker population. This expansion was also the impetus for breaking ground on the Broad Street Line subway, designed specifically to carry a passenger from the northern hub of Olney to Philadelphia City Hall in under 20 minutes. Major freight and passenger rail lines were built to intersect at the newly constructed North Broad Street Station and transmit cargo from the bustling factories. The completion of the BSL these major railways made the region a thriving hub of transportation. For a time, North Philadelphia station became the second most heavily trafficked rail station in the city, and the Olney Ave station the most used subway stop. Along with many of Philadelphia's major manufacturing concerns came the nearby estates of the wealthy industrialists who had founded them. Lower North Philadelphia in particular housed a number of the nouveau riche: ambitious first or second generation immigrants or those that had made their fortunes starting manufacturing firms. Many were German Jews who had settled in the area, later founding companies and building synagogues. For a time, an age of opulence and grand architecture returned to North Philadelphia, centered on what is now zoned as the Historic North Broad Street Mansion and Speculative Housing Districts. Gentlemen's clubs, upscale restaurants and shopping districts grew in this southern tier for a brief moment in history, peaking in the late 1920s. Upper-class foremen and executives lived farther north along Broad Street, in what is now the West Diamond Street Townhouse Historic District. Thriving commercial districts sprung up along the great northern avenues: Columbia (renamed Cecil B. Moore Avenue), Susquehanna, Dauphin, Erie, Lehigh and Olney, to name a few. However, just as this wealth was so suddenly gained, it would just as suddenly be lost. The new money culture proved to be an unstable foundation for a lasting community, and like so many constructs of the Gilded Age, this core of wealth was doomed